2064 lines
61 KiB
Bash
Executable File
2064 lines
61 KiB
Bash
Executable File
#!/usr/bin/env bash
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### BEGIN INIT INFO
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# Provides: ipt-firewall
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# Required-Start: $local_fs $remote_fs $syslog $network
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# Required-Stop: $local_fs $remote_fs $syslog $network
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# Should-Start:
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# Should-Stop:
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: IPv4 Firewall
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### END INIT INFO
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CONFIG_DIR="/etc/ipt-firewall"
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CONFIG_FILE="${CONFIG_DIR}/ipt-firewall-server.conf"
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if [[ -z "$fail2ban_client" ]]; then
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fail2ban_client="$(which fail2ban-client)"
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fi
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# ------------- Load Kernel Modules -------------
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#
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## - Load appropriate modules.
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## -
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if ! $host_is_vm ; then
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/sbin/modprobe ip_tables > /dev/null 2>&1
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/sbin/modprobe iptable_nat > /dev/null 2>&1
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# - Note:!
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# - Since Kernel 4.7 the automatic conntrack helper assignment
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# - is disabled by default (net.netfilter.nf_conntrack_helper = 0).
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# - Enable it by setting this variable in file /etc/sysctl.conf:
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# -
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# - net.netfilter.nf_conntrack_helper = 1
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# -
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# - Reboot or type "sysctl -p"
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# -
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# - !! But this is NOT the recommend method !!
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# ---
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# - Load module for FTP Connection tracking and NAT
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# ---
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# - Once a helper is loaded, it will treat packets for a given port and all IP addresses.
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# - As explained before, this is not optimal and is even a security risk. A better
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# - solution is to load the module helper and deactivate their parsing by default. Each
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# - helper we need to use is then set by using a call to the CT target.
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# -
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# - Desactivate the automatic conntrack helper assignment:
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# -
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# - method 1: modprobe nf_conntrack nf_conntrack_helper=0
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# - method 2: echo 0 > /proc/sys/net/netfilter/nf_conntrack_helper
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# -
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# - Note:
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# - =====
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# - Each helper we need to use is then set by using a call to the CT target.
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# - Example for ftp helper on standardport:
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# -
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# - ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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# -
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/sbin/modprobe nf_conntrack nf_conntrack_helper=0 > /dev/null 2>&1
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#echo 0 > /proc/sys/net/netfilter/nf_conntrack_helper
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/sbin/modprobe nf_conntrack_ftp > /dev/null 2>&1
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/sbin/modprobe nf_nat > /dev/null 2>&1
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/sbin/modprobe nf_nat_ftp > /dev/null 2>&1
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## - Load modules for SIP VOIP
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## -
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#/sbin/modprobe nf_conntrack_sip > /dev/null 2>&1
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#/sbin/modprobe nf_nat_sip > /dev/null 2>&1
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fi
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#
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# ------------- End: Load Kernel Modules -------------
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echo
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echo -e "\033[37m\033[1m\tStarting firewall iptables (IpV4)..\033[m"
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echo
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## --------------------------------------------------------------------------
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## --- All Configurations will be done in /etc/ipt-firewall/ipt-firewall.conf
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## --------------------------------------------------------------------------
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if [[ -f "$CONFIG_FILE" ]]; then
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source $CONFIG_FILE
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else
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echo
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echo -e "\033[31m\033[1m\tNo Configuration File found..\033[m \033[37m\033[1mExiting now!\033[m"
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echo
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exit 1
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fi
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# -------------
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# --- Activate IP Forwarding
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# -------------
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## - IP Forwarding deaktivieren.
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## -
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## - Activate if kernel_activate_forwarding ist set to true, deactivate otherwise
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## -
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## - Only needed, if hosts acts as a router.
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## -
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if $kernel_activate_forwarding ; then
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echo 1 > /proc/sys/net/ipv4/ip_forward
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echononl "\tActivate Forwarding.."
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echo_done
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else
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echo 0 > /proc/sys/net/ipv4/ip_forward
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echononl "\t\033[33m\033[1mDisable Forwarding..\033[m"
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echo_done
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fi
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if $kernel_support_dynaddr ; then
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echononl "\tActivate kernel support for dynamic addresses.."
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if [[ -n $dynaddr_flag ]] && [[ $dynaddr_flag =~ ^-?[0-9]+$ ]]; then
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echo $dynaddr_flag > /proc/sys/net/ipv4/ip_dynaddr
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echo_done
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else
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echo_failed
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fi
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else
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echo 0 > /proc/sys/net/ipv4/ip_dynaddr
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echononl "\t\033[33m\033[1mDisable kernel support for dynamic addresses..\033[m"
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echo_done
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fi
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# -------------
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# --- Adjust Kernel Parameters (Security/Tuning)
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# -------------
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echononl "\tAdjust Kernel Parameters (Security/Tuning).."
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if ! $host_is_vm ; then
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## - Reduce DoS'ing ability by reducing timeouts
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## -
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if $kernel_reduce_timeouts ; then
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echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
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echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_time
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echo 1 > /proc/sys/net/ipv4/tcp_window_scaling
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echo 0 > /proc/sys/net/ipv4/tcp_sack
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fi
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## - SYN COOKIES
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## -
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if $kernel_tcp_syncookies ; then
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echo 1 > /proc/sys/net/ipv4/tcp_syncookies
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echo 2048 > /proc/sys/net/ipv4/tcp_max_syn_backlog
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echo 3 > /proc/sys/net/ipv4/tcp_synack_retries
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fi
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## - Protection against ICMP bogus error responses
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## -
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if $kernel_protect_against_icmp_bogus_messages ; then
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echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
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fi
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## - Ignore Broadcast Pings
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## -
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if $kernel_ignore_broadcast_ping ; then
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echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
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fi
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## - Deactivate Source Routed Packets
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## -
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if $kernel_deactivate_source_route ; then
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for asr in /proc/sys/net/ipv4/conf/*/accept_source_route ; do
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echo 0 > $asr
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done
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fi
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## - Deactivate sending ICMP redirects
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## -
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if $kernel_dont_accept_redirects ; then
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for rp_filter in /proc/sys/net/ipv4/conf/*/rp_filter ; do
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echo 1 > $rp_filter
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done
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fi
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## - Logging of spoofed (source routed" and "redirect") packets
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## -
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if $kernel_log_martians ; then
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echo "0" > /proc/sys/net/ipv4/conf/all/log_martians
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fi
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## - Keine ICMP Umleitungspakete akzeptieren.
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## -
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## - Diese können zur Veränderung der Routing Tables verwendet
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## - werden, möglicherweise mit einem böswilligen Ziel.
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## -
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#echo "0" > /proc/sys/net/ipv4/conf/all/accept_redirects
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## - NUMBER OF CONNECTIONS TO TRACK
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## -
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#echo "65535" > /proc/sys/net/ipv4/netfilter/ip_conntrack_max
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echo_done # Adjust Kernel Parameters (Security/Tuning)
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else
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echo_skipped
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fi
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# ------------- Stop Fail2Ban if installed -------------
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#
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if [ -x "$fail2ban_client" ]; then
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echononl "\tStopping fail2ban.."
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$fail2ban_client stop > /dev/null 2>&1
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if [ "$?" = "0" ];then
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echo_done
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else
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echo_warning
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fi
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fi
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#
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# ------------- Ende: Stop Fail2Ban if installed -------------
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# -------------
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# --- Set default policies / Flush Rules
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# -------------
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echo
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echononl "\tFlushing firewall iptable (IPv4).."
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# - default policies
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# -
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$ipt -P INPUT ACCEPT
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$ipt -P OUTPUT ACCEPT
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$ipt -P FORWARD ACCEPT
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## - flush chains
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## -
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$ipt -F
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$ipt -F INPUT
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$ipt -F OUTPUT
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$ipt -F FORWARD
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$ipt -F -t mangle
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$ipt -F -t nat
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$ipt -F -t raw
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$ipt -X
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$ipt -Z
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echo_done # Flushing firewall iptable (IPv6)..
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echo
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# -------------
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# --- Prevent bridged traffic getting pushed through the host's iptables rules
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# -------------
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echononl "\tDo not firewall bridged traffic"
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if $do_not_firewall_bridged_traffic ; then
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# - Matches if the packet is being bridged and therefore is not being routed.
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# - This is only useful in the FORWARD and POSTROUTING chains.
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# -
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$ipt -I FORWARD -m physdev --physdev-is-bridged -j ACCEPT
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# - Matches if the packet has entered through a bridge interface.
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# -
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$ipt -I FORWARD -m physdev --physdev-is-in -j ACCEPT
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# - Matches if the packet will leave through a bridge interface.
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# -
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$ipt -I FORWARD -m physdev --physdev-is-out -j ACCEPT
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echo_done
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else
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echo_skipped
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fi
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echo
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# -------------
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# ------------ Stopping firewall if only flushing was requested (parameter flush)
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# -------------
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case $1 in
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flush)
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echo
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echo -e "\t\033[37m\033[1mFlushing firewall was requested. No more rules..\033[m"
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echo
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exit 0;;
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esac
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# -------------
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# --- Pass through Devices Interfaces (not firewalled)
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# -------------
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if [[ ${#unprotected_if_arr[@]} -gt 0 ]]; then
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echononl "\tPass through Devices (not firewalled)"
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for _dev in ${unprotected_if_arr[@]} ; do
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if $log_unprotected || $log_all ; then
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$ipt -A INPUT -i $_dev -j LOG --log-prefix "$log_prefix Not firewalled ${_dev}: " --log-level $log_level
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$ipt -A OUTPUT -o $_dev -j LOG --log-prefix "$log_prefix Not firewalled ${_dev}: " --log-level $log_level
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$ipt -A FORWARD -i $_dev -j LOG --log-prefix "$log_prefix Not firewalled ${_dev}: " --log-level $log_level
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$ipt -A FORWARD -o $_dev -j LOG --log-prefix "$log_prefix Not firewalled ${_dev}: " --log-level $log_level
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fi
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$ipt -A INPUT -i $_dev -j ACCEPT
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$ipt -A OUTPUT -o $_dev -j ACCEPT
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$ipt -A FORWARD -i $_dev -j ACCEPT
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$ipt -A FORWARD -o $_dev -j ACCEPT
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done
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echo_done
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fi
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# -------------
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# --- Block IPs / Networks / Interfaces
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# -------------
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echononl "\tBlock IPs / Networks / Interfaces.."
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# ---
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# - Block IPs
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# ---
|
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for _ip in $blocked_ips ; do
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for _dev in ${ext_if_arr[@]} ; do
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if $log_blocked_ip || $log_all ; then
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$ipt -A INPUT -i $_dev -s $_ip -j LOG --log-prefix "$log_prefix Blocked ${_ip}: " --log-level $log_level
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if $kernel_activate_forwarding ; then
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$ipt -A FORWARD -i $_dev -s $_ip -j LOG --log-prefix "$log_prefix Blocked ${_ip}: " --log-level $log_level
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fi
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fi
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$ipt -A INPUT -i $_dev -s $_ip -j DROP
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if $kernel_activate_forwarding ; then
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$ipt -A FORWARD -i $_dev -s $_ip -j DROP
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fi
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done
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done
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# ---
|
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# - Block Interfaces
|
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# ---
|
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|
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for _if in ${blocked_if_arr[@]} ; do
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if $log_blocked_if || $log_all ; then
|
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if $kernel_activate_forwarding ; then
|
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$ipt -A FORWARD -i $_if -j LOG --log-prefix "$log_prefix Blocked IF ${_if}: " --log-level $log_level
|
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$ipt -A FORWARD -o $_if -j LOG --log-prefix "$log_prefix Blocked IF ${_if}: " --log-level $log_level
|
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fi
|
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$ipt -A INPUT -i $_if -j LOG --log-prefix "$log_prefix Blocked IF ${_if}: " --log-level $log_level
|
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$ipt -A OUTPUT -o $_if -j LOG --log-prefix "$log_prefix Blocked IF ${_if}: " --log-level $log_level
|
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fi
|
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if $kernel_activate_forwarding ; then
|
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$ipt -A FORWARD -i $_if -j DROP
|
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$ipt -A FORWARD -o $_if -j DROP
|
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fi
|
||
$ipt -A INPUT -i $_if -j DROP
|
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$ipt -A OUTPUT -o $_if -j DROP
|
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done
|
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|
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echo_done # Block IPs / Networks / Interfaces..
|
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|
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# ---
|
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# - Block IPs/Netwoks reading from file 'ban_ipv4.list'"
|
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# ---
|
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|
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echononl "\tBlock IPs/Netwoks reading from file 'ban_ipv4.list' .."
|
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|
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if [[ -f "${CONFIG_DIR}/ban_ipv4.list" ]] ; then
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declare -a octets
|
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declare -i index
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|
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while IFS='' read -r _line || [[ -n $_line ]] ; do
|
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is_valid_ipv4=true
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is_valid_mask=true
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ipv4=""
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mask=""
|
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# Ignore comment lines
|
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#
|
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[[ $_line =~ ^[[:space:]]{0,}# ]] && continue
|
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|
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# Ignore blank lines
|
||
#
|
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[[ $_line =~ ^[[:space:]]*$ ]] && continue
|
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# Remove leading whitespace characters
|
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#
|
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_line="${_line#"${_line%%[![:space:]]*}"}"
|
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|
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# Catch IPv4 Address
|
||
#
|
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given_ipv4="$(echo $_line | cut -d ' ' -f1)"
|
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|
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# Splitt Ipv4 address from possible given CIDR number
|
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#
|
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IFS='/' read -ra _addr <<< "$given_ipv4"
|
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_ipv4="${_addr[0]}"
|
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|
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if [[ -n "${_addr[1]}" ]] ; then
|
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_mask="${_addr[1]}"
|
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test_netmask=false
|
||
|
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# Is 'mask' a valid CIDR number? If not, test agains a valid netmask
|
||
#
|
||
if $(test -z "${_mask##*[!0-9]*}" > /dev/null 2>&1) ; then
|
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|
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# Its not a vaild mask number, but naybe a valit netmask.
|
||
#
|
||
test_netmask=true
|
||
else
|
||
if [[ $_mask -gt 32 ]]; then
|
||
|
||
# Its not a vaild cidr number, but naybe a valit netmask.
|
||
#
|
||
test_netmask=true
|
||
else
|
||
|
||
# OK, we have a vaild cidr number between '0' and '32'
|
||
#
|
||
mask=$_mask
|
||
fi
|
||
fi
|
||
|
||
# Test if given '_mask' is a valid netmask.
|
||
#
|
||
if $test_netmask ; then
|
||
octets=( ${_mask//\./ } )
|
||
|
||
# Complete netmask if necessary
|
||
#
|
||
while [[ ${#octets[@]} -lt 4 ]]; do
|
||
octets+=(0)
|
||
done
|
||
|
||
[[ ${#octets[@]} -gt 4 ]] && is_valid_mask=false
|
||
|
||
index=0
|
||
for octet in ${octets[@]} ; do
|
||
if [[ ${octet} =~ ^[0-9]{1,3}$ ]] ; then
|
||
if [[ $octet -gt 255 ]] ; then
|
||
is_valid_mask=false
|
||
fi
|
||
if [[ $index -gt 0 ]] ; then
|
||
mask="${mask}.${octet}"
|
||
else
|
||
mask="${octet}"
|
||
fi
|
||
|
||
else
|
||
is_valid_mask=false
|
||
fi
|
||
|
||
((index++))
|
||
done
|
||
fi
|
||
|
||
adjust_mask=false
|
||
else
|
||
mask=32
|
||
adjust_mask=true
|
||
fi
|
||
|
||
# Splitt given address into their octets
|
||
#
|
||
octets=( ${_ipv4//\./ } )
|
||
|
||
# Complete IPv4 address if necessary
|
||
#
|
||
while [[ ${#octets[@]} -lt 4 ]]; do
|
||
octets+=(0)
|
||
|
||
# Only adjust CIDR number if not given
|
||
#
|
||
if $adjust_mask ; then
|
||
mask="$(expr $mask - 8)"
|
||
fi
|
||
done
|
||
|
||
# Pre-check if given IPv4 Address seems to be a valid address
|
||
#
|
||
[[ ${#octets[@]} -gt 4 ]] && is_valid_ipv4=false
|
||
|
||
# Check if given IPv4 Address is a valid address
|
||
#
|
||
if $is_valid_ipv4 ; then
|
||
index=0
|
||
for octet in ${octets[@]} ; do
|
||
if [[ ${octet} =~ ^[0-9]{1,3}$ ]] ; then
|
||
if [[ $octet -gt 255 ]] ; then
|
||
is_valid_ipv4=false
|
||
fi
|
||
if [[ $index -gt 0 ]] ; then
|
||
ipv4="${ipv4}.${octet}"
|
||
else
|
||
ipv4="${octet}"
|
||
fi
|
||
|
||
else
|
||
is_valid_ipv4=false
|
||
fi
|
||
|
||
((index++))
|
||
done
|
||
fi
|
||
|
||
if $is_valid_ipv4 && $is_valid_mask; then
|
||
|
||
_ip="${ipv4}/${mask}"
|
||
|
||
if containsElement "$_ip" "${ban_ipv4_arr[@]}" ; then
|
||
continue
|
||
fi
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_blocked_ip || $log_all ; then
|
||
$ipt -A INPUT -i $_dev -s $_ip -j LOG --log-prefix "$log_prefix Blocked: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -s $_ip -j LOG --log-prefix "$log_prefix Blocked: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -i $_dev -s $_ip -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -s $_ip -j DROP
|
||
fi
|
||
done
|
||
|
||
ban_ipv4_arr+=("$_ip")
|
||
|
||
else
|
||
msg="$msg '${given_ipv4}'"
|
||
fi
|
||
|
||
done < "${CONFIG_DIR}/ban_ipv4.list"
|
||
echo_done
|
||
|
||
if [[ -n "$msg" ]]; then
|
||
warn "Ignored:$msg"
|
||
fi
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Allow Forwarding certain private Addresses
|
||
# ---
|
||
|
||
if [[ ${#forward_private_ip_arr[@]} -gt 0 ]] ; then
|
||
echononl "\tAllow forwarding (private) IPs / IP-Ranges.."
|
||
for _ip in ${forward_private_ip_arr[@]}; do
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -d $_ip -j ACCEPT
|
||
$ipt -A FORWARD -s $_ip -j ACCEPT
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
done
|
||
fi
|
||
|
||
|
||
|
||
# -------------
|
||
# --- Protections against several attacks / unwanted packages
|
||
# -------------
|
||
echo
|
||
echononl "\tProtections against several attacks / unwanted packages.."
|
||
|
||
|
||
# ---
|
||
# - Protection against syn-flooding
|
||
# ---
|
||
|
||
$ipt -N syn-flood
|
||
$ipt -A syn-flood -m limit --limit 1/second --limit-burst 3 -j RETURN
|
||
if $log_syn_flood || $log_all ; then
|
||
$ipt -A syn-flood -j LOG --log-prefix "$log_prefix SYN flood: " --log-level $log_level
|
||
fi
|
||
$ipt -A syn-flood -j DROP
|
||
|
||
|
||
# ---
|
||
# - Drop Fragments
|
||
# ---
|
||
|
||
# I have to say that fragments scare me more than anything.
|
||
# Sending lots of non-first fragments was what allowed Jolt2 to effectively "drown"
|
||
# Firewall-1. Fragments can be overlapped, and the subsequent interpretation of such
|
||
# fragments is very OS-dependent (see this paper for details).
|
||
# I am not going to trust any fragments.
|
||
# Log fragments just to see if we get any, and deny them too
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_fragments || $log_all ; then
|
||
$ipt -A INPUT -i $_dev -f -j LOG --log-prefix "$log_prefix IPTABLES FRAGMENTS: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -f -j LOG --log-prefix "$log_prefix IPTABLES FRAGMENTS: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -i $_dev -f -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -f -j DROP
|
||
fi
|
||
done
|
||
|
||
|
||
# ---
|
||
# - drop new packages without syn flag
|
||
# ---
|
||
|
||
if $log_new_not_sync || $log_all ; then
|
||
$ipt -A INPUT -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "$log_prefix New but not SYN: " --log-level $log_level
|
||
$ipt -A OUTPUT -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "$log_prefix New but not SYN: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "$log_prefix New but not SYN: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -p tcp ! --syn -m state --state NEW -j DROP
|
||
$ipt -A OUTPUT -p tcp ! --syn -m state --state NEW -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -p tcp ! --syn -m state --state NEW -j DROP
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - drop invalid packages
|
||
# ---
|
||
|
||
if $log_invalid_state || $log_all ; then
|
||
$ipt -A INPUT -m state --state INVALID -j LOG --log-prefix "$log_prefix Invalid state: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -m state --state INVALID -j LOG --log-prefix "$log_prefix Invalid state: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -m state --state INVALID -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -m state --state INVALID -j DROP
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - ungewöhnliche Flags verwerfen
|
||
# ---
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_invalid_flags || $log_all ; then
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags ALL ACK,RST,SYN,FIN -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags SYN,FIN SYN,FIN -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags SYN,RST SYN,RST -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags ALL ACK,RST,SYN,FIN -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags SYN,FIN SYN,FIN -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags SYN,RST SYN,RST -j LOG --log-prefix "$log_prefix Invalid flags: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags ALL ACK,RST,SYN,FIN -j DROP
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
|
||
$ipt -A INPUT -i $_dev -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags ALL ACK,RST,SYN,FIN -j DROP
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
|
||
$ipt -A FORWARD -i $_dev -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
|
||
fi
|
||
done
|
||
|
||
|
||
# ---
|
||
# - Refuse private addresses on extern interfaces
|
||
# ---
|
||
|
||
# Refuse spoofed packets pretending to be from your IP address.
|
||
if $log_spoofed || $log_all ; then
|
||
# input
|
||
for _ip in ${ext_ip_arr[@]} ; do
|
||
$ipt -A INPUT -s $_ip -d $_ip -j LOG --log-prefix "$log_prefix Spoofed (own ip): " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -s $_ip -d $_ip -j LOG --log-prefix "$log_prefix Spoofed (own ip): " --log-level $log_level
|
||
fi
|
||
done
|
||
fi
|
||
for _ip in ${ext_ip_arr[@]} ; do
|
||
$ipt -A INPUT -s $_ip -d $_ip -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -s $_ip -d $_ip -j DROP
|
||
fi
|
||
done
|
||
|
||
|
||
# Refuse packets claiming to be from a
|
||
# Class A private network
|
||
# Class B private network
|
||
# Class C private network
|
||
# loopback interface
|
||
# Class D multicast address
|
||
# Class E reserved IP address
|
||
# broadcast address
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_spoofed || $log_all ; then
|
||
$ipt -A INPUT -i $_dev -s $priv_class_a -j LOG --log-prefix "$log_prefix Class A private net: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -s $priv_class_b -j LOG --log-prefix "$log_prefix Class B private net: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -s $priv_class_c -j LOG --log-prefix "$log_prefix Class C private net: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -s $loopback -j LOG --log-prefix "$log_prefix From Loopback: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -s $class_d_multicast -j LOG --log-prefix "$log_prefix Class D Multicast: " --log-level $log_level
|
||
$ipt -A INPUT -i $_dev -s $class_e_reserved -j LOG --log-prefix "$log_prefix Class E reserved: " --log-level $log_level
|
||
#$ipt -A INPUT -i $_dev -d $broadcast_addr -j LOG --log-prefix "$log_prefix Broadcast Address: " --log-level $log_level
|
||
#
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_a -j LOG --log-prefix "$log_prefix Class A private net: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_b -j LOG --log-prefix "$log_prefix Class B private net: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_c -j LOG --log-prefix "$log_prefix Class C private net: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -s $loopback -j LOG --log-prefix "$log_prefix From Loopback: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -s $class_d_multicast -j LOG --log-prefix "$log_prefix Class D Multicast: " --log-level $log_level
|
||
$ipt -A FORWARD -i $_dev -s $class_e_reserved -j LOG --log-prefix "$log_prefix Class E reserved: " --log-level $log_level
|
||
#$ipt -A FORWARD -i $_dev -d $broadcast_addr -j LOG --log-prefix "$log_prefix Broadcast Address: " --log-level $log_level
|
||
fi
|
||
fi
|
||
# Refuse packets claiming to be from a Class A private network.
|
||
$ipt -A INPUT -i $_dev -s $priv_class_a -j DROP
|
||
# Refuse packets claiming to be from a Class B private network.
|
||
$ipt -A INPUT -i $_dev -s $priv_class_b -j DROP
|
||
# Retfuse packets claiming to be from a Class C private network.
|
||
$ipt -A INPUT -i $_dev -s $priv_class_c -j DROP
|
||
# Refuse packets claiming to be from loopback interface.
|
||
$ipt -A INPUT -i $_dev -s $loopback -j DROP
|
||
# Refuse Class D multicast addresses. Multicast is illegal as a source address.
|
||
$ipt -A INPUT -i $_dev -s $class_d_multicast -j DROP
|
||
# Refuse Class E reserved IP addresses.
|
||
$ipt -A INPUT -i $_dev -s $class_e_reserved -j DROP
|
||
# Refuse broadcast address packets.
|
||
#$ipt -A INPUT -i $_dev -d $broadcast_addr -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
# Refuse packets claiming to be from a Class A private network.
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_a -j DROP
|
||
# Refuse packets claiming to be from a Class B private network.
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_b -j DROP
|
||
# Refuse packets claiming to be from a Class C private network.
|
||
$ipt -A FORWARD -i $_dev -s $priv_class_c -j DROP
|
||
# Refuse packets claiming to be from loopback interface.
|
||
$ipt -A FORWARD -i $_dev -s $loopback -j DROP
|
||
# Refuse Class D multicast addresses. Multicast is illegal as a source address.
|
||
$ipt -A FORWARD -i $_dev -s $class_d_multicast -j DROP
|
||
# Refuse Class E reserved IP addresses.
|
||
$ipt -A FORWARD -i $_dev -s $class_e_reserved -j DROP
|
||
# Refuse broadcast address packets.
|
||
#$ipt -A FORWARD -i $_dev -d $broadcast_addr -j DROP
|
||
fi
|
||
done
|
||
|
||
|
||
# ---
|
||
# - Refuse packets claiming to be to the loopback interface.
|
||
# ---
|
||
|
||
# Refusing packets claiming to be to the loopback interface protects against
|
||
# source quench, whereby a machine can be told to slow itself down by an icmp source
|
||
# quench to the loopback.
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_to_lo || $log_all ; then
|
||
$ipt -A INPUT -i $_dev -d $loopback -j LOG --log-prefix "$log_prefix To Loopback: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -d $loopback -j LOG --log-prefix "$log_prefix To Loopback: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A INPUT -i $_dev -d $loopback -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -d $loopback -j DROP
|
||
fi
|
||
done
|
||
|
||
|
||
# ---
|
||
# - Don't allow spoofing from that server
|
||
# ---
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_spoofed_out || $log_all ; then
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_a -j LOG --log-prefix "$log_prefix out Class A: " --log-level $log_level
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_b -j LOG --log-prefix "$log_prefix out Class B: " --log-level $log_level
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_c -j LOG --log-prefix "$log_prefix out Class C: " --log-level $log_level
|
||
$ipt -A OUTPUT -o $_dev -s $loopback -j LOG --log-prefix "$log_prefix out Loopback: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_a -j LOG --log-prefix "$log_prefix out Class A: " --log-level $log_level
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_b -j LOG --log-prefix "$log_prefix out Class B: " --log-level $log_level
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_c -j LOG --log-prefix "$log_prefix out Class C: " --log-level $log_level
|
||
$ipt -A FORWARD -o $_dev -s $loopback -j LOG --log-prefix "$log_prefix out Loopback: " --log-level $log_level
|
||
fi
|
||
fi
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_a -j DROP
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_b -j DROP
|
||
$ipt -A OUTPUT -o $_dev -s $priv_class_c -j DROP
|
||
$ipt -A OUTPUT -o $_dev -s $loopback -j DROP
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_a -j DROP
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_b -j DROP
|
||
$ipt -A FORWARD -o $_dev -s $priv_class_c -j DROP
|
||
$ipt -A FORWARD -o $_dev -s $loopback -j DROP
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
|
||
# -------------
|
||
# ------------- Stopping firewall here if requested (parameter stop)
|
||
# -------------
|
||
|
||
case $1 in
|
||
sto*)
|
||
#echononl "Stopping firewall iptable (IPv4).."
|
||
echo
|
||
echo -e "\t\033[37m\033[1mStop was requested. No more rules..\033[m"
|
||
echo
|
||
exit 0;;
|
||
esac
|
||
|
||
|
||
echo
|
||
|
||
# -------------
|
||
# --- Traffic Counter (used by munin)
|
||
# -------------
|
||
|
||
echononl "\tCreate Traffic Counter (used by munin)"
|
||
if $create_traffic_counter ; then
|
||
for _ip in ${ext_ip_arr[@]} ; do
|
||
$ipt -A INPUT -d $_ip
|
||
$ipt -A INPUT -s $_ip
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -d $_ip
|
||
$ipt -A FORWARD -s $_ip
|
||
fi
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# -------------
|
||
# --- iPerf
|
||
# -------------
|
||
|
||
# iPerf is a tool for active measurements of the maximum achievable bandwidth on IP networks.
|
||
# It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP,
|
||
# SCTP with IPv4 and IPv6). For each test it reports the bandwidth, loss, and other parameters.
|
||
|
||
echononl "\tCreate \"iPerf\" rules.."
|
||
if $create_iperf_rules ; then
|
||
$ipt -A INPUT -p tcp --dport 5001 -j ACCEPT
|
||
$ipt -A INPUT -p tcp --sport 5001 -j ACCEPT
|
||
#
|
||
$ipt -A OUTPUT -p tcp --dport 5001 -j ACCEPT
|
||
$ipt -A OUTPUT -p tcp --sport 5001 -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -p tcp --dport 5001 -j ACCEPT
|
||
$ipt -A FORWARD -p tcp --sport 5001 -j ACCEPT
|
||
fi
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# -------------
|
||
# --- Generally prohibited
|
||
# -------------
|
||
|
||
echononl "\tGenerally prohibited traffic.."
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
if $log_prohibited || $log_all ; then
|
||
for _port in ${block_tcp_port_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -i $_dev --dport $_port -j LOG --log-prefix "$log_prefix gen. prohibited: " --log-level $log_level
|
||
done
|
||
for _port in ${block_udp_port_arr[@]} ; do
|
||
$ipt -A INPUT -p udp -i $_dev --dport $_port -j LOG --log-prefix "$log_prefix gen. prohibited: " --log-level $log_level
|
||
done
|
||
if $kernel_activate_forwarding ; then
|
||
for _port in ${block_tcp_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -i $_dev --dport $_port -j LOG --log-prefix "$log_prefix gen. prohibited: " --log-level $log_level
|
||
done
|
||
for _port in ${block_udp_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p udp -i $_dev --dport $_port -j LOG --log-prefix "$log_prefix gen. prohibited: " --log-level $log_level
|
||
done
|
||
fi
|
||
fi
|
||
for _port in ${block_tcp_port_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -i $_dev --dport $_port -j DROP
|
||
done
|
||
for _port in ${block_udp_port_arr[@]} ; do
|
||
$ipt -A INPUT -p udp -i $_dev --dport $_port -j DROP
|
||
done
|
||
if $kernel_activate_forwarding ; then
|
||
for _port in ${block_tcp_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -i $_dev --dport $_port -j DROP
|
||
done
|
||
for _port in ${block_udp_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p udp -i $_dev --dport $_port -j DROP
|
||
done
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
echo
|
||
|
||
|
||
# -------------
|
||
# --- Traffic generally allowed
|
||
# -------------
|
||
|
||
echononl "\tLoopback device generally allowed.."
|
||
|
||
# ---
|
||
# - Loopback device
|
||
# ---
|
||
|
||
$ipt -A INPUT -i lo -j ACCEPT
|
||
$ipt -A OUTPUT -o lo -j ACCEPT
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Already established connections
|
||
# ---
|
||
|
||
echononl "\tAccept already established connections.."
|
||
|
||
$ipt -A INPUT -p ALL -m state --state ESTABLISHED,RELATED -j ACCEPT
|
||
$ipt -A OUTPUT -p ALL -m state --state ESTABLISHED,RELATED -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -p ALL -m state --state ESTABLISHED,RELATED -j ACCEPT
|
||
fi
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Permit all traffic through VPN lines
|
||
# ---
|
||
echononl "\tPermit all traffic through VPN lines.."
|
||
for _vpn_if in ${vpn_if_arr[@]} ; do
|
||
$ipt -A INPUT -i $_vpn_if -m state --state NEW -j ACCEPT
|
||
$ipt -A OUTPUT -o $_vpn_if -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_vpn_if -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -o $_vpn_if -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
echo_done
|
||
|
||
echo
|
||
|
||
|
||
# -------------
|
||
# ---- Restrict local Servive to given (extern) IP-Address/Network
|
||
# -------------
|
||
|
||
echononl "\tRestrict local Service to given (extern) IP-Address/Network"
|
||
if [[ ${#restrict_local_service_to_net_arr[@]} -gt 0 ]] ; then
|
||
|
||
_deny_service_arr=()
|
||
|
||
for _val in "${restrict_local_service_to_net_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A INPUT -i $_dev -p ${_val_arr[3]} -s ${_val_arr[0]} -d ${_val_arr[1]} --dport ${_val_arr[2]} -m state --state NEW -j ACCEPT
|
||
|
||
if ! containsElement "${_dev}:${_val_arr[1]}:${_val_arr[2]}:${_val_arr[3]}" "${_deny_service_arr[@]}" ; then
|
||
_deny_service_arr+=("${_dev}:${_val_arr[1]}:${_val_arr[2]}:${_val_arr[3]}")
|
||
fi
|
||
|
||
done
|
||
|
||
done
|
||
|
||
for _val in "${_deny_service_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
$ipt -A INPUT -i ${_val_arr[0]} -p ${_val_arr[3]} -d ${_val_arr[1]} --dport ${_val_arr[2]} -j DROP
|
||
done
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# -------------
|
||
# ---- Restrict local Network to given extern IP-Address/Network
|
||
# -------------
|
||
|
||
echononl "\tRestrict local Address/Network to given extern Address/Network"
|
||
if [[ ${#restrict_local_net_to_net_arr[@]} -gt 0 ]] ; then
|
||
|
||
_deny_net_arr=()
|
||
|
||
for _val in "${restrict_local_net_to_net_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A INPUT -i $_dev -s ${_val_arr[0]} -d ${_val_arr[1]} -m state --state NEW -j ACCEPT
|
||
|
||
if ! containsElement "${_dev}:${_val_arr[1]}" "${_deny_net_arr[@]}" ; then
|
||
_deny_net_arr+=("${_dev}:${_val_arr[1]}")
|
||
fi
|
||
|
||
done
|
||
|
||
done
|
||
|
||
for _val in "${_deny_net_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
$ipt -A INPUT -i ${_val_arr[0]} -d ${_val_arr[1]} -j DROP
|
||
done
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# -------------
|
||
# --- Services
|
||
# -------------
|
||
|
||
echo
|
||
echo -e "\t\033[37m\033[1mAdd Rules for Services..\033[m"
|
||
|
||
|
||
# -------------
|
||
# ---- Allow extern Service
|
||
# -------------
|
||
|
||
echononl "\t\tAllow extern Service"
|
||
|
||
if [[ ${#allow_ext_service_arr[@]} -gt 0 ]] ; then
|
||
for _dev in "${ext_if_arr[@]}" ; do
|
||
for _val in "${allow_ext_service_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
$ipt -A OUTPUT -o $_dev -p ${_val_arr[2]} -d ${_val_arr[0]} --dport ${_val_arr[1]} -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# -------------
|
||
# ---- Allow extern IP-Address/Network
|
||
# -------------
|
||
|
||
echononl "\t\tAllow extern IP-Address/Network"
|
||
|
||
if [[ ${#allow_ext_net_arr[@]} -gt 0 ]] ; then
|
||
for _dev in "${ext_if_arr[@]}" ; do
|
||
for _net in "${allow_ext_net_arr[@]}" ; do
|
||
$ipt -A OUTPUT -o $_dev -p all -d $_net -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
echo
|
||
|
||
|
||
# -------------
|
||
# ---- Allow (non-standard) local Services
|
||
# -------------
|
||
|
||
echononl "\t\tAllow (non-standard) local Services"
|
||
|
||
if [[ ${#allow_local_service_arr[@]} -gt 0 ]] ; then
|
||
for _dev in "${ext_if_arr[@]}" ; do
|
||
for _val in "${allow_local_service_arr[@]}" ; do
|
||
IFS=':' read -a _val_arr <<< "${_val}"
|
||
$ipt -A INPUT -i $_dev -p ${_val_arr[1]} --dport ${_val_arr[0]} -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
echo
|
||
|
||
|
||
# ---
|
||
# - DHCP
|
||
# ---
|
||
|
||
echononl "\t\tDHCP"
|
||
|
||
if [[ ${#dhcp_if_arr[@]} -gt 0 ]] ; then
|
||
for _dev in ${dhcp_if_arr[@]} ; do
|
||
# - in
|
||
$ipt -A INPUT -p udp -i $_dev -s 0/0 --sport 68 -d 255.255.255.255 --dport 67 -j ACCEPT
|
||
# - out
|
||
$ipt -A OUTPUT -p udp -o $_dev --sport 67 -d 0/0 --dport 68 -j ACCEPT
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
|
||
# ---
|
||
# - DNS out only
|
||
# ---
|
||
|
||
echononl "\t\tDNS out only"
|
||
|
||
# - Nameservers on the INET must be reachable for the local recursiv nameserver
|
||
# - but also for all others
|
||
# -
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
# - out from local and virtual mashine(s)
|
||
$ipt -A OUTPUT -o $_dev -p udp --dport 53 -m state --state NEW -j ACCEPT
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 53 -m state --state NEW -j ACCEPT
|
||
|
||
# - Only useful (needed) if kernel forwarding is activated (kernel_activate_forwarding=true)
|
||
if $kernel_activate_forwarding ; then
|
||
# - forward from virtual mashine(s)
|
||
$ipt -A FORWARD -o $_dev -p udp --dport 53 -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 53 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
|
||
# ---
|
||
# - DNS Service
|
||
# ---
|
||
|
||
echononl "\t\tDNS Service"
|
||
|
||
if [[ ${#dns_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_dns_server_ip_arr[@]} -gt 0 ]] ; then
|
||
if [[ ${#dns_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${dns_server_ips[@]} ; do
|
||
# dns requests
|
||
#
|
||
# Note:
|
||
# If the total size of the DNS record is larger than 512 bytes,
|
||
# it will be sent over TCP, not UDP.
|
||
#
|
||
$ipt -A INPUT -p udp -d $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
$ipt -A INPUT -p tcp -d $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
# Zonetransfer
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_dns_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_dns_server_ip_arr[@]} ; do
|
||
# dns requests
|
||
#
|
||
# Note:
|
||
# If the total size of the DNS record is larger than 512 bytes,
|
||
# it will be sent over TCP, not UDP.
|
||
#
|
||
$ipt -A FORWARD -p udp -d $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -p tcp -d $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
# Zonetransfer
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport 53 -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - SSH out only
|
||
# ---
|
||
|
||
echononl "\t\tSSH out only"
|
||
|
||
# ausgehende Anfragen
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 22 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 22 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
for _dev in ${local_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 22 -m state --state NEW -j ACCEPT
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - SSH Service
|
||
# ---
|
||
|
||
echononl "\t\tSSH Service"
|
||
|
||
if [[ ${#ssh_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_ssh_server_ip_arr[@]} -gt 0 ]] ; then
|
||
if [[ ${#ssh_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${ssh_server_ip_arr[@]} ; do
|
||
for _port in ${ssh_port_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -d $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_ssh_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_ssh_server_ip_arr[@]} ; do
|
||
for _port in ${ssh_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -d $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - VPN
|
||
# ---
|
||
|
||
echononl "\t\tVPN Service only out"
|
||
if [[ ${#vpn_port_arr[@]} -gt 0 ]] ; then
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
for _port in ${vpn_port_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p udp --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
echononl "\t\tVPN Services.."
|
||
if [[ ${#vpn_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_vpn_server_ip_arr[@]} -gt 0 ]] ; then
|
||
if [[ ${#vpn_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${vpn_server_ip_arr[@]} ; do
|
||
for _port in ${vpn_port_arr[@]} ; do
|
||
$ipt -A INPUT -p udp -d $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_vpn_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_vpn_server_ip_arr[@]} ; do
|
||
for _port in ${vpn_port_arr[@]} ; do
|
||
$ipt -A FORWARD -p udp -d $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Rsync Out
|
||
# ---
|
||
|
||
echononl "\t\tRsync (only OUT)"
|
||
|
||
if [[ ${#rsync_out_ip_arr[@]} -gt 0 ]] || [[ ${#forward_rsync_out_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#rsync_out_ip_arr[@]} -gt 0 ]] ; then
|
||
for _port in ${rsync_port_arr[@]} ; do
|
||
|
||
for _ip in ${rsync_out_ip_arr[@]} ; do
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_rsync_out_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _port in ${rsync_port_arr[@]} ; do
|
||
|
||
for _ip in ${forward_rsync_out_ip_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Telnet
|
||
# ---
|
||
|
||
echononl "\t\tTelnet (only OUT)"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 23 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 23 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - MySQL
|
||
# ---
|
||
|
||
echononl "\t\tMySQL (only OUT)"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 3306 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 3306 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Munin remote service
|
||
# ---
|
||
|
||
echononl "\t\tMunin remote service"
|
||
|
||
if [ "X$munin_remote_ip" != "X" ]; then
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A INPUT -i $_dev -p tcp --syn -s $munin_remote_ip --dport $munin_local_port -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -i $_dev -p tcp --syn -s $munin_remote_ip --dport $munin_local_port -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Munin local service
|
||
# ---
|
||
|
||
echononl "\t\tMunin local service"
|
||
|
||
|
||
if [[ ${#munin_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_munin_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#munin_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${munin_server_ip_arr[@]} ; do
|
||
$ipt -A OUTPUT -p tcp --syn -s $_ip --dport $munin_remote_port -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_munin_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_munin_server_ip_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp --syn -s $_ip --dport $munin_remote_port -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Mail (SMTP OUT)
|
||
# ---
|
||
|
||
echononl "\t\tMail (SMTP OUT)"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 25 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 25 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Mail SMTP Server (Port 25) including Spam Control
|
||
# ---
|
||
|
||
echononl "\t\tMail SMTP Server (Port 25) including Spam Control"
|
||
|
||
if [[ ${#smtpd_ips_arr[@]} -gt 0 ]] || [[ ${#forward_smtpd_ip_arr[@]} -gt 0 ]] ; then
|
||
if [[ ${#smtpd_ips_arr[@]} > 0 ]] ; then
|
||
|
||
for _ip in ${smtpd_ips_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -d $_ip --dport 25 -m state --state NEW -j ACCEPT
|
||
#
|
||
# Razor2 (TCP Port 2703)
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport 2703 -m state --state NEW -j ACCEPT
|
||
# DEPRECATED: TCP Port 7 (echo)
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport 7 -m state --state NEW -j ACCEPT
|
||
#
|
||
# Pyzor (UDP Port 24441 or TCP Port 24441 or both ?)
|
||
$ipt -A OUTPUT -p udp -s $_ip --dport 24441 -m state --state NEW -j ACCEPT
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport 24441 -m state --state NEW -j ACCEPT
|
||
#
|
||
# - DCC (port udp:6277)
|
||
$ipt -A OUTPUT -s $_ip -p udp -m udp --dport 6277 -m state --state NEW -j ACCEPT
|
||
# if DCC Server is running (port tcp:6277)
|
||
$ipt -A INPUT -p tcp -d $_ip --dport 6277 -j ACCEPT
|
||
$ipt -A OUTPUT -p tcp -s $_ip --dport 6277 -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_smtpd_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_smtpd_ip_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -d $_ip --dport 25 -m state --state NEW -j ACCEPT
|
||
#
|
||
# Razor2 (TCP Port 2703)
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport 2703 -m state --state NEW -j ACCEPT
|
||
# DEPRECATED: TCP Port 7 (echo)
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport 7 -m state --state NEW -j ACCEPT
|
||
#
|
||
# Pyzor (UDP Port 24441 or TCP Port 24441 or both ?)
|
||
$ipt -A FORWARD -p udp -s $_ip --dport 24441 -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport 24441 -m state --state NEW -j ACCEPT
|
||
#
|
||
# DCC (port udp:6277)
|
||
$ipt -A FORWARD -s $_ip -p udp -m udp --dport 6277 -m state --state NEW -j ACCEPT
|
||
# if DCC Server is running (port tcp:6277)
|
||
$ipt -A FORWARD -p tcp -d $_ip --dport 6277 -j ACCEPT
|
||
$ipt -A FORWARD -p tcp -s $_ip --dport 6277 -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Mailservice (Submission/SMTPS/POP/IMAP Server)
|
||
# ---
|
||
|
||
echononl "\t\tMailservice (Submission/SMTPS/POP/IMAP Server)"
|
||
|
||
if [[ ${#mail_server_ips_arr[@]} -gt 0 ]] || [[ ${#forward_mail_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#mail_server_ips_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${mail_server_ips_arr[@]} ; do
|
||
# mail ports
|
||
#
|
||
$ipt -A INPUT -p tcp -d $_ip -m multiport --dports $mail_user_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi # if [[ ${#mail_server_ips_arr[@]} -gt 0 ]]
|
||
|
||
if [[ ${#forward_mail_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_mail_server_ip_arr[@]} ; do
|
||
# mail ports
|
||
#
|
||
$ipt -A FORWARD -p tcp -d $_ip -m multiport --dports $mail_user_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi # if [[ ${#forward_mail_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Mail Client (Submission/SMTPS/POPS/IMAPS) out only
|
||
# ---
|
||
|
||
echononl "\t\tMail Client (Submission/SMTPS/POPS/IMAPS) out only"
|
||
|
||
if [[ ${#mail_client_ips_arr[@]} -gt 0 ]] || [[ ${#forward_mail_client_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#mail_client_ips_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${mail_client_ips_arr[@]} ; do
|
||
# mail ports
|
||
#
|
||
$ipt -A OUTPUT -p tcp -s $_ip -m multiport --dports $mail_user_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi # if [[ ${#mail_client_ips_arr[@]} -gt 0 ]]
|
||
|
||
if [[ ${#forward_mail_client_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_mail_client_ip_arr[@]} ; do
|
||
# mail ports
|
||
#
|
||
$ipt -A FORWARD -p tcp -s $_ip -m multiport --dports $mail_user_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi # if [[ ${#forward_mail_client_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - HTTP(S) OUT
|
||
# ---
|
||
|
||
echononl "\t\tHTTP(S) out only"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp -m multiport --dports $http_ports -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp -m multiport --dports $http_ports -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - HTTP(S) (local) Webserver
|
||
# ---
|
||
|
||
echononl "\t\tHTTP(S) (local) Webserver"
|
||
|
||
if [[ ${#http_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_http_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#http_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${http_server_ip_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -d $_ip -m multiport --dports $http_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
|
||
if [[ ${#forward_http_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_http_server_ip_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -d $_ip -m multiport --dports $http_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - FTP out only"
|
||
# ---
|
||
|
||
echononl "\t\tFTP out only (using CT target)"
|
||
|
||
# - (Re)define helper
|
||
# -
|
||
$ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
|
||
|
||
# - Used for different ftpdata recent lists 'ftpdata_out_$j'
|
||
# -
|
||
declare -i j=1
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
|
||
# - (1)
|
||
# -
|
||
# - Open FTP connection and add the destination ip (--rdest) to ftpdata recent list 'ftpdata_out_$j'.
|
||
# -
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 21 -m state --state NEW \
|
||
-m recent --name ftpdata_out_$j --rdest --set -j ACCEPT
|
||
|
||
# - (2)
|
||
# - - Accept packets if the destination ip-address (--rdest) is in the 'ftpdata_$j' list (--update)
|
||
# - and the destination ip-address was seen within the last 1800 seconds (--seconds 1800).
|
||
# -
|
||
# - - If matched, the "last seen" timestamp of the destination address will be updated (--update).
|
||
# -
|
||
# - - Entries in the ftpdata list not seen in the last 1800 will be removed (--reap).
|
||
# -
|
||
$ipt -A OUTPUT -o $_dev -p tcp -m state --state NEW --dport 1024: \
|
||
-m recent --name ftpdata_out_$j --rdest --update --seconds 1800 --reap -j ACCEPT
|
||
|
||
((i++))
|
||
|
||
# - Accept (helper ftp) related connections
|
||
# -
|
||
$ipt -A OUTPUT -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
|
||
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
#echononl "\t\tFTP out only"
|
||
#
|
||
#for _dev in ${ext_if_arr[@]} ; do
|
||
# # (Datenkanal aktiv)
|
||
# $ipt -A INPUT -i $_dev -p tcp --sport 20 -m state --state NEW -j ACCEPT
|
||
# # (Datenkanal passiv)
|
||
# $ipt -A OUTPUT -o $_dev -p tcp --sport $unprivports --dport $unprivports -m state --state NEW -j ACCEPT
|
||
# # (Kontrollverbindung)
|
||
# $ipt -A OUTPUT -o $_dev -p tcp --dport 21 -m state --state NEW -j ACCEPT
|
||
# if $kernel_activate_forwarding ; then
|
||
# # (Datenkanal aktiv)
|
||
# $ipt -A FORWARD -i $_dev -p tcp --sport 20 -m state --state NEW -j ACCEPT
|
||
# # (Datenkanal passiv)
|
||
# $ipt -A FORWARD -o $_dev -p tcp --sport $unprivports --dport $unprivports -m state --state NEW -j ACCEPT
|
||
# # (Kontrollverbindung)
|
||
# $ipt -A FORWARD -o $_dev -p tcp --dport 21 -m state --state NEW -j ACCEPT
|
||
# fi
|
||
#done
|
||
#
|
||
#echo_done
|
||
|
||
|
||
# ---
|
||
# - FTP Server"
|
||
# ---
|
||
|
||
echononl "\t\tFTP Server (using CT target)"
|
||
|
||
if [[ ${#ftp_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_ftp_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
# - Used for different ftpdata recent lists 'ftpdata_$i'
|
||
declare -i i=1
|
||
|
||
# - (Re)define helper
|
||
# -
|
||
# - !! Note: !!
|
||
# - for both, local FTP server (ftp_server_ip_arr)
|
||
# - and forward to FTP server (forward_ftp_server_ip_arr)
|
||
# -
|
||
$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
|
||
|
||
if [[ ${#ftp_server_ip_arr[@]} -gt 0 ]] ; then
|
||
|
||
for _ip in ${ftp_server_ip_arr[@]} ; do
|
||
|
||
# =====
|
||
# -
|
||
# - ip_conntrack_ftp cannot see the TLS-encrypted traffic
|
||
# - ======================================================
|
||
# -
|
||
# - Workaround:
|
||
# - (1) add source ip to a 'recent list' named 'ftpdata_$i! if ftp control connections appear
|
||
# - (2) accept packets of the formaly created recent list 'ftpdata_$i!
|
||
# -
|
||
# =====
|
||
|
||
# - (1)
|
||
# -
|
||
# - Accept initial FTP connection and add the source ip to ftpdata recent list 'ftpdata_$i'.
|
||
# -
|
||
$ipt -A INPUT -p tcp -m state --state NEW -d $_ip --dport 21 -m recent --name ftpdata_$i --set -j ACCEPT
|
||
|
||
# - (2)
|
||
# - - Accept packets if the source ip-address is in the 'ftpdata_$i' list (--update) and the
|
||
# - source ip-address was seen within the last 1800 seconds (--seconds 1800).
|
||
# -
|
||
# - - If matched, the "last seen" timestamp of the source address will be updated (--update).
|
||
# -
|
||
# - - Entries in the ftpdata list not seen in the last 1800 will be removed (--reap).
|
||
# -
|
||
$ipt -A INPUT -p tcp -m state --state NEW --sport 1024: -d $_ip --dport $ftp_passive_port_range \
|
||
-m recent --name ftpdata_$i --update --seconds 1800 --reap -j ACCEPT
|
||
|
||
# - Accept (helper ftp) related connections
|
||
# -
|
||
$ipt -A INPUT -m conntrack --ctstate RELATED -m helper --helper ftp -d $_ip -p tcp --dport 1024: -j ACCEPT
|
||
|
||
((i++))
|
||
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_ftp_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
|
||
for _ip in ${forward_ftp_server_ip_arr[@]} ; do
|
||
|
||
# =====
|
||
# -
|
||
# - ip_conntrack_ftp cannot see the TLS-encrypted traffic
|
||
# - ======================================================
|
||
# -
|
||
# - Workaround:
|
||
# - (1) add source ip to a 'recent list' named 'ftpdata_$i! if ftp control connections appear
|
||
# - (2) accept packets of the formaly created recent list 'ftpdata_$i!
|
||
# -
|
||
# =====
|
||
|
||
# - (1)
|
||
# -
|
||
# - Accept initial FTP connection and add the source ip to ftpdata recent list 'ftpdata_$i'.
|
||
# -
|
||
$ipt -A FORWARD -p tcp -m state --state NEW -d $_ip --dport 21 -m recent --name ftpdata_$i --set -j ACCEPT
|
||
|
||
# - (2)
|
||
# - - Accept packets if the source ip-address is in the 'ftpdata_$i' list (--update) and the
|
||
# - source ip-address was seen within the last 1800 seconds (--seconds 1800).
|
||
# -
|
||
# - - If matched, the "last seen" timestamp of the source address will be updated (--update).
|
||
# -
|
||
# - - Entries in the ftpdata list not seen in the last 1800 will be removed (--reap).
|
||
# -
|
||
$ipt -A FORWARD -p tcp -m state --state NEW --sport 1024: -d $_ip --dport $ftp_passive_port_range \
|
||
-m recent --name ftpdata_$i --update --seconds 1800 --reap -j ACCEPT
|
||
$ipt -A FORWARD -p tcp -m state --state NEW --dport 1024: -s $_ip --sport $ftp_passive_port_range \
|
||
-m recent --name ftpdata_$i --update --seconds 1800 --reap -j ACCEPT
|
||
|
||
# - Accept (helper ftp) related connections
|
||
# -
|
||
$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -d $_ip -p tcp --dport 1024: -j ACCEPT
|
||
$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -s $_ip -p tcp --sport 1024: -j ACCEPT
|
||
|
||
((i++))
|
||
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
#echononl "\t\tFTP Server"
|
||
#
|
||
#if [[ ${#ftp_server_ip_arr[@]} -gt 0 ]] || [[ ${#forward_ftp_server_ip_arr[@]} -gt 0 ]] ; then
|
||
# if [[ ${#ftp_server_ip_arr[@]} -gt 0 ]] ; then
|
||
# for _ip in ${ftp_server_ip_arr[@]} ; do
|
||
# # (Datenkanal aktiv)
|
||
# $ipt -A OUTPUT -p tcp -s $_ip --sport 20 -m state --state NEW -j ACCEPT
|
||
# # Datenkanal (passiver modus)
|
||
# $ipt -A INPUT -p tcp -d $_ip --dport $unprivports --sport $unprivports -m state --state NEW -j ACCEPT
|
||
# # - Kontrollverbindung
|
||
# $ipt -A INPUT -p tcp -d $_ip --dport 21 --sport $unprivports -m state --state NEW -j ACCEPT
|
||
# done
|
||
# fi
|
||
#
|
||
# if [[ ${#forward_ftp_server_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
# for _ip in ${forward_ftp_server_ip_arr[@]} ; do
|
||
# # (Datenkanal aktiv)
|
||
# $ipt -A FORWARD -p tcp -s $_ip --sport 20 -m state --state NEW -j ACCEPT
|
||
# # Datenkanal (passiver modus)
|
||
# $ipt -A FORWARD -p tcp -d $_ip --dport $unprivports --sport $unprivports -m state --state NEW -j ACCEPT
|
||
# # - Kontrollverbindung
|
||
# $ipt -A FORWARD -p tcp -d $_ip --dport 21 --sport $unprivports -m state --state NEW -j ACCEPT
|
||
# done
|
||
# fi
|
||
#
|
||
# echo_done
|
||
#else
|
||
# echo_skipped
|
||
#fi
|
||
|
||
|
||
# ---
|
||
# - Mumble Service
|
||
# ---
|
||
|
||
echononl "\t\tMumble Service"
|
||
|
||
|
||
if [[ ${#mumble_server_ip_arr[@]} -gt 0 ]] || $local_mumble_service ; then
|
||
if [[ ${#mumble_server_ip_arr[@]} -gt 0 ]] ; then
|
||
for _ip in ${mumble_server_ip_arr[@]} ; do
|
||
$ipt -A INPUT -p tcp -d $_ip -m multiport --dports $mumble_ports -m state --state NEW -j ACCEPT
|
||
$ipt -A INPUT -p udp -d $_ip -m multiport --dports $mumble_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_mumble_server_ip_arr[@]} ]] && $kernel_activate_forwarding ; then
|
||
for _ip in ${forward_mumble_server_ip_arr[@]} ; do
|
||
$ipt -A FORWARD -p tcp -d $_ip -m multiport --dports $mumble_ports -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -p udp -d $_ip -m multiport --dports $mumble_ports -m state --state NEW -j ACCEPT
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Timeserver (Port 37 NOT NTP!)"
|
||
# ---
|
||
|
||
echononl "\t\tTimeserver (Port 37 NOT NTP!) out only"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 37 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 37 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - NTP out only"
|
||
# ---
|
||
|
||
echononl "\t\tNTP out only"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 123 -m state --state NEW -j ACCEPT
|
||
$ipt -A OUTPUT -o $_dev -p udp --dport 123 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 123 -m state --state NEW -j ACCEPT
|
||
$ipt -A FORWARD -o $_dev -p udp --dport 123 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Whois out only
|
||
# ---
|
||
|
||
echononl "\t\tWhois out only"
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport 43 -m state --state NEW -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport 43 -m state --state NEW -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
echo
|
||
|
||
|
||
# ---
|
||
# - Special TCP Ports OUT
|
||
# ---
|
||
|
||
echononl "\t\tSpecial TCP Ports OUT"
|
||
|
||
if [[ ${#tcp_out_port_arr[@]} -gt 0 ]] || [[ ${#forward_tcp_out_port_arr[@]} -gt 0 ]] ; then
|
||
|
||
if [[ ${#forward_tcp_out_port_arr[@]} -gt 0 ]] ; then
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
for _port in ${tcp_out_port_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p tcp --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_tcp_out_port_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
for _port in ${tcp_out_port_arr[@]} ; do
|
||
$ipt -A FORWARD -o $_dev -p tcp --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Special UDP Ports OUT
|
||
# ---
|
||
|
||
echononl "\t\tSpecial UDP Ports OUT"
|
||
|
||
if [[ ${#udp_out_port_arr[@]} -gt 0 ]] || [[ ${#forward_udp_out_port_arr[@]} -gt 0 ]] ; then
|
||
if [[ ${#udp_out_port_arr[@]} -gt 0 ]] ; then
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
for _port in ${udp_out_port_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p udp --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
if [[ ${#forward_udp_out_port_arr[@]} -gt 0 ]] ; then
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
for _port in ${forward_udp_out_port_arr[@]} ; do
|
||
$ipt -A FORWARD -o $_dev -p udp --dport $_port -m state --state NEW -j ACCEPT
|
||
done
|
||
done
|
||
fi
|
||
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
echo
|
||
|
||
|
||
# ---
|
||
# - UNIX Traceroute
|
||
# ---
|
||
|
||
echononl "\t\tUNIX Traceroute"
|
||
|
||
# versendet udp packete im gegensatz zu tracert von windows
|
||
# der icmp-echo-request pakete versendet
|
||
# einige implementierungen von traceroute (linux) erm<72>lichens
|
||
# die option -I und versenden dann ebenfalls icmp-echo-request pakete
|
||
|
||
for _dev in ${ext_if_arr[@]} ; do
|
||
$ipt -A OUTPUT -o $_dev -p udp -m state --state NEW --dport 33434:33530 -j ACCEPT
|
||
$ipt -A INPUT -i $_dev -p udp -m state --state NEW --dport 33434:33530 -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -o $_dev -p udp -m state --state NEW --dport 33434:33530 -j ACCEPT
|
||
$ipt -A FORWARD -i $_dev -p udp -m state --state NEW --dport 33434:33530 -j ACCEPT
|
||
fi
|
||
done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - Ping
|
||
# ---
|
||
|
||
echononl "\t\tPing"
|
||
|
||
$ipt -A INPUT -p icmp -j ACCEPT
|
||
$ipt -A OUTPUT -p icmp -j ACCEPT
|
||
if $kernel_activate_forwarding ; then
|
||
$ipt -A FORWARD -p icmp -j ACCEPT
|
||
fi
|
||
|
||
#for _dev in ${ext_if_arr[@]} ; do
|
||
# $ipt -A INPUT -i $_dev -p icmp -j ACCEPT
|
||
# $ipt -A OUTPUT -o $_dev -p icmp -j ACCEPT
|
||
# if $kernel_activate_forwarding ; then
|
||
# $ipt -A FORWARD -i $_dev -p icmp -j ACCEPT
|
||
# $ipt -A FORWARD -o $_dev -p icmp -j ACCEPT
|
||
# fi
|
||
#done
|
||
#for _dev in ${local_if_arr[@]} ; do
|
||
# $ipt -A INPUT -i $_dev -p icmp -j ACCEPT
|
||
# $ipt -A OUTPUT -o $_dev -p icmp -j ACCEPT
|
||
# if $kernel_activate_forwarding ; then
|
||
# $ipt -A FORWARD -i $_dev -p icmp -j ACCEPT
|
||
# $ipt -A FORWARD -o $_dev -p icmp -j ACCEPT
|
||
# fi
|
||
#done
|
||
|
||
echo_done
|
||
|
||
|
||
# ---
|
||
# - log all rejected traffic
|
||
# ---
|
||
|
||
echo
|
||
echononl "\tLogging all rejected traffic"
|
||
|
||
if $log_rejected || $log_all ; then
|
||
#$ipt -A OUTPUT -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
#$ipt -A INPUT -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
#$ipt -A FORWARD -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
$ipt -A OUTPUT -m limit --limit-burst 5 -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
$ipt -A INPUT -m limit --limit-burst 5 -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
if $kernel_activate_forwarding ; then
|
||
#$ipt -A FORWARD -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
$ipt -A FORWARD -m limit --limit-burst 5 -j LOG --log-prefix "$log_prefix Rejected: " --log-level $log_level
|
||
fi
|
||
echo_done
|
||
else
|
||
echo_skipped
|
||
fi
|
||
|
||
|
||
# ---
|
||
# - Drop all other
|
||
# ---
|
||
|
||
echo
|
||
echononl "\tDrop all other on all interfaces"
|
||
|
||
$ipt -A INPUT -j DROP
|
||
$ipt -A OUTPUT -j DROP
|
||
$ipt -A FORWARD -j DROP
|
||
|
||
echo_done
|
||
|
||
|
||
|
||
# -------------
|
||
# ------------- Start Fail2Ban if installed
|
||
# -------------
|
||
if [ -x "$fail2ban_client" ]; then
|
||
echo
|
||
echononl "\tStarting fail2ban.."
|
||
$fail2ban_client start > /dev/null 2>&1
|
||
if [ "$?" = "0" ];then
|
||
echo_done
|
||
elif [ "$?" = "255" ]; then
|
||
echo_skipped
|
||
else
|
||
echo_failed
|
||
fi
|
||
fi
|
||
|
||
echo
|
||
exit 0
|
||
|
||
|
||
|
||
# ------------ Portforwarding ------------- #
|
||
# -
|
||
# - !! NOTICE:
|
||
# - you need also portforwarding enabled at the kernel
|
||
# - echo 1 >/proc/sys/net/ipv4/ip_forward
|
||
#
|
||
#
|
||
# ----------------------------------------------
|
||
# <old-ip>:<old-port> --> <new-ip>:<new-port>:80
|
||
# ----------------------------------------------
|
||
#
|
||
#$ipt -A FORWARD [-i <iface>] -p tcp --dport <new-port> -d <new-ip> -j ACCEPT
|
||
#$ipt -A FORWARD [-o <iface>] -p tcp --sport <new-port> -s <new-ip> -j ACCEPT
|
||
#
|
||
#$ipt -t nat -A PREROUTING [-i <iface>] -p tcp --dport <old-port> [-d <old-ip>] -j DNAT --to-destination <new-ip>:<new-port>
|
||
#$ipt -t nat -A POSTROUTING -d <new-ip> -j MASQUERADE
|
||
#
|
||
#
|
||
# -----------------------------------------------
|
||
# www-alt.oopen.de --> www-neu.oopen.de
|
||
#
|
||
# 46.4.129.3:80 --> 83.223.86.130:80
|
||
# 46.4.129.3:443 --> 83.223.86.130:443
|
||
# -----------------------------------------------
|
||
#
|
||
#$ipt -A FORWARD -p tcp -m multiport --dports 80,443 -d 83.223.86.130 -j ACCEPT
|
||
#$ipt -A FORWARD -p tcp -m multiport --sports 80,443 -s 83.223.86.130 -j ACCEPT
|
||
#
|
||
#$ipt -t nat -A PREROUTING -p tcp --dport 80 -d 46.4.129.3 -j DNAT --to-destination 83.223.86.130:80
|
||
#$ipt -t nat -A PREROUTING -p tcp --dport 443 -d 46.4.129.3 -j DNAT --to-destination 83.223.86.130:443
|
||
#$ipt -t nat -A POSTROUTING -d 83.223.86.130 -j MASQUERADE
|
||
#
|
||
# -
|
||
# ---------- Ende Portforwarding ---------- #
|
||
|