Redesign of rules 'FTP Service local Networks'.
This commit is contained in:
parent
967aa4b9d3
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@ -2076,6 +2076,12 @@ else
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fi
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# ---
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# - FTP common
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# ---
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ftp_helper_output_defined=false
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ftp_helper_prerouting_defined=false
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# ---
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# - FTP out only
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# ---
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@ -2090,9 +2096,13 @@ if $allow_ftp_request_out ; then
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# - (Re)define helper
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# -
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$ip6t -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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if $kernel_forward_between_interfaces ; then
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if ! $ftp_helper_output_defined ; then
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$ip6t -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_output_defined=true
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fi
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if $kernel_forward_between_interfaces && ! $ftp_helper_prerouting_defined ; then
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$ip6t -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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for _dev in ${ext_if_arr[@]} ; do
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@ -2218,7 +2228,10 @@ if $local_ftp_service ; then
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# - for both, local FTP server (ftp_server_ip_arr)
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# - and forward to (extern) FTP server (forward_ftp_server_ip_arr)
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# -
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$ip6t -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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if ! $ftp_helper_prerouting_defined ; then
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$ip6t -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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# - (1)
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# -
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@ -2252,31 +2265,97 @@ fi
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# ---
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echononl "\t\tFTP Service local Networks"
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if [[ ${#ftp_server_only_local_ip_arr[@]} -gt 0 ]] && $kernel_forward_between_interfaces ; then
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# - Used for different ftpdata recent lists 'ftp6data_local_$k'
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# -
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declare -i k=1
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# - (Re)define helper
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# -
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if ! $ftp_helper_output_defined ; then
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$ip6t -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_output_defined=true
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fi
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if $kernel_forward_between_interfaces && ! $permit_between_local_networks && ! $ftp_helper_prerouting_defined ; then
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$ip6t -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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for _ip in ${ftp_server_only_local_ip_arr[@]} ; do
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$ip6t -A OUTPUT -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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if ! $permit_between_local_networks ; then
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$ip6t -A FORWARD -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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# - (1)
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# -
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# - Open FTP connection and add the destination ip (--rdest) to ftpdata recent list 'ftpdata_$i'.
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# -
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$ip6t -A OUTPUT -p tcp -d $_ip --dport 21 --sport 1024: -m state --state NEW \
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-m recent --name ftp6data_local_$k --rdest --set -j ACCEPT
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$ip6t -A FORWARD -d $_ip -p tcp --dport 21 -m state --state NEW \
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-m recent --name ftp6data_local_$k --rdest --set -j ACCEPT
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# - (2)
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# - - Accept packets if the destination ip-address (--rdest) is in the 'ftpdata_$i' list (--update)
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# - and the destination ip-address was seen within the last 1800 seconds (--seconds 1800).
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# -
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# - - If matched, the "last seen" timestamp of the destination address will be updated (--update).
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# -
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# - - Entries in the ftpdata list not seen in the last 1800 will be removed (--reap).
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# -
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$ip6t -A OUTPUT -d $_ip -p tcp -m state --state NEW --dport 1024: \
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-m recent --name ftp6data_local_$k --rdest --update --seconds 1800 --reap -j ACCEPT
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if $kernel_forward_between_interfaces && ! $permit_between_local_networks ; then
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$ip6t -A FORWARD -d $_ip -p tcp -m state --state NEW --dport 1024: \
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-m recent --name ftp6data_local_$k --rdest --update --seconds 1800 --reap -j ACCEPT
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fi
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if $local_alias_interfaces ; then
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# - Control Port
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$ip6t -A FORWARD -p tcp -d $_ip --dport 21 --tcp-flag ACK ACK -j ACCEPT
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$ip6t -A FORWARD -p tcp -s $_ip --sport 21 --tcp-flag ACK ACK -j ACCEPT
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# - Data Port activ
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$ip6t -A FORWARD -p tcp -d $_ip --dport 20 --tcp-flag ACK ACK -j ACCEPT
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$ip6t -A FORWARD -p tcp -s $_ip --sport 20 --tcp-flag ACK ACK -j ACCEPT
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# - Data Port passiv
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$ip6t -A FORWARD -p tcp -d $_ip --sport $unprivports --dport $unprivports --tcp-flag ACK ACK -j ACCEPT
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((k++))
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# - Accept (helper ftp) related connections
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# -
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$ip6t -A OUTPUT -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
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$ip6t -A INPUT -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
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if $kernel_forward_between_interfaces && ! $permit_between_local_networks ; then
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$ip6t -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -p tcp -d $_ip --dport 1024: -j ACCEPT
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$ip6t -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -p tcp -s $_ip --dport 1024: -j ACCEPT
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fi
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done
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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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#echononl "\t\tFTP Service local Networks"
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#if [[ ${#ftp_server_only_local_ip_arr[@]} -gt 0 ]] && $kernel_forward_between_interfaces ; then
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# for _ip in ${ftp_server_only_local_ip_arr[@]} ; do
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# $ip6t -A OUTPUT -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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#
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# if ! $permit_between_local_networks ; then
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# $ip6t -A FORWARD -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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# fi
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#
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# if $local_alias_interfaces ; then
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# # - Control Port
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# $ip6t -A FORWARD -p tcp -d $_ip --dport 21 --tcp-flag ACK ACK -j ACCEPT
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# $ip6t -A FORWARD -p tcp -s $_ip --sport 21 --tcp-flag ACK ACK -j ACCEPT
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# # - Data Port activ
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# $ip6t -A FORWARD -p tcp -d $_ip --dport 20 --tcp-flag ACK ACK -j ACCEPT
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# $ip6t -A FORWARD -p tcp -s $_ip --sport 20 --tcp-flag ACK ACK -j ACCEPT
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# # - Data Port passiv
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# $ip6t -A FORWARD -p tcp -d $_ip --sport $unprivports --dport $unprivports --tcp-flag ACK ACK -j ACCEPT
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# fi
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# done
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#
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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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# ---
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# - FTP Services DMZ
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@ -2761,6 +2761,12 @@ else
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fi
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# ---
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# - FTP common
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# ---
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ftp_helper_output_defined=false
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ftp_helper_prerouting_defined=false
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# ---
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# - FTP out only
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# ---
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@ -2773,11 +2779,13 @@ if $allow_ftp_request_out ; then
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# -
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declare -i i=1
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# - (Re)define helper
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# -
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$ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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if $kernel_activate_forwarding ; then
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if ! $ftp_helper_output_defined ; then
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$ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_output_defined=true
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fi
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if $kernel_activate_forwarding && ! $ftp_helper_prerouting_defined ; then
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$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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for _dev in ${ext_if_arr[@]} ; do
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@ -2902,7 +2910,10 @@ if $local_ftp_service ; then
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# - for both, local FTP server (ftp_server_ip_arr)
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# - and forward to (extern) FTP server (forward_ftp_server_ip_arr)
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# -
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$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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if ! $ftp_helper_prerouting_defined ; then
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$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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# - (1)
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# -
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@ -2936,32 +2947,100 @@ fi
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# ---
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echononl "\t\tFTP Service local Networks"
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if [[ ${#ftp_server_only_local_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
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# - Used for different ftpdata recent lists 'ftpdata_local_$k'
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# -
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declare -i k=1
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# - (Re)define helper
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# -
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if ! $ftp_helper_output_defined ; then
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$ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_output_defined=true
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fi
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if $kernel_activate_forwarding && ! $permit_between_local_networks && ! $ftp_helper_prerouting_defined ; then
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$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
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ftp_helper_prerouting_defined=true
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fi
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for _ip in ${ftp_server_only_local_ip_arr[@]} ; do
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$ipt -A OUTPUT -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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if ! $permit_between_local_networks ; then
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$ipt -A FORWARD -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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# - (1)
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# -
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# - Open FTP connection and add the destination ip (--rdest) to ftpdata recent list 'ftpdata_$i'.
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# -
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$ipt -A OUTPUT -p tcp -d $_ip --dport 21 --sport 1024: -m state --state NEW \
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-m recent --name ftpdata_local_$k --rdest --set -j ACCEPT
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$ipt -A FORWARD -d $_ip -p tcp --dport 21 -m state --state NEW \
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-m recent --name ftpdata_local_$k --rdest --set -j ACCEPT
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# - (2)
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# - - Accept packets if the destination ip-address (--rdest) is in the 'ftpdata_$i' list (--update)
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# - and the destination ip-address was seen within the last 1800 seconds (--seconds 1800).
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# -
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# - - If matched, the "last seen" timestamp of the destination address will be updated (--update).
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# -
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# - - Entries in the ftpdata list not seen in the last 1800 will be removed (--reap).
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# -
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$ipt -A OUTPUT -d $_ip -p tcp -m state --state NEW --dport 1024: \
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-m recent --name ftpdata_local_$k --rdest --update --seconds 1800 --reap -j ACCEPT
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if $kernel_activate_forwarding && ! $permit_between_local_networks ; then
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$ipt -A FORWARD -d $_ip -p tcp -m state --state NEW --dport 1024: \
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-m recent --name ftpdata_local_$k --rdest --update --seconds 1800 --reap -j ACCEPT
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fi
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if $local_alias_interfaces ; then
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# - Control Port
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$ipt -A FORWARD -p tcp -d $_ip --dport 21 --tcp-flag ACK ACK -j ACCEPT
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$ipt -A FORWARD -p tcp -s $_ip --sport 21 --tcp-flag ACK ACK -j ACCEPT
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# - Data Port activ
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$ipt -A FORWARD -p tcp -d $_ip --dport 20 --tcp-flag ACK ACK -j ACCEPT
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$ipt -A FORWARD -p tcp -s $_ip --sport 20 --tcp-flag ACK ACK -j ACCEPT
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# - Data Port passiv
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$ipt -A FORWARD -p tcp -d $_ip --sport $unprivports --dport $unprivports --tcp-flag ACK ACK -j ACCEPT
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((k++))
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# - Accept (helper ftp) related connections
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# -
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$ipt -A OUTPUT -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
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$ipt -A INPUT -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
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if $kernel_activate_forwarding && ! $permit_between_local_networks ; then
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$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -p tcp -d $_ip --dport 1024: -j ACCEPT
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$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -p tcp -s $_ip --dport 1024: -j ACCEPT
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fi
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done
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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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#echononl "\t\tFTP Service local Networks"
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#if [[ ${#ftp_server_only_local_ip_arr[@]} -gt 0 ]] && $kernel_activate_forwarding ; then
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# for _ip in ${ftp_server_only_local_ip_arr[@]} ; do
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# $ipt -A OUTPUT -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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#
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# if ! $permit_between_local_networks ; then
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# $ipt -A FORWARD -p tcp -d $_ip --dport 21 --sport $unprivports -m conntrack --ctstate NEW -j ACCEPT
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# fi
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#
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# if $local_alias_interfaces ; then
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# # - Control Port
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# $ipt -A FORWARD -p tcp -d $_ip --dport 21 --tcp-flag ACK ACK -j ACCEPT
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# $ipt -A FORWARD -p tcp -s $_ip --sport 21 --tcp-flag ACK ACK -j ACCEPT
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# # - Data Port activ
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# $ipt -A FORWARD -p tcp -d $_ip --dport 20 --tcp-flag ACK ACK -j ACCEPT
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# $ipt -A FORWARD -p tcp -s $_ip --sport 20 --tcp-flag ACK ACK -j ACCEPT
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# # - Data Port passiv
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# $ipt -A FORWARD -p tcp -d $_ip --sport $unprivports --dport $unprivports --tcp-flag ACK ACK -j ACCEPT
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# fi
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# done
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#
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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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# ---
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# - FTP Services DMZ
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# ---
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