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Use CT helper for ftp rules.

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This commit is contained in:
Christoph 2019-02-24 17:15:04 +01:00
parent 29c0ad1906
commit b697715679
3 changed files with 95 additions and 23 deletions
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2
conf/load_modules_ipv4.conf
View File

@ -21,7 +21,7 @@ iptable_raw
# - Load base modules for tracking
# -
nf_conntrack
nf_conntrack nf_conntrack_helper=0
nf_nat
# - Load module for FTP Connection tracking and NAT

58
ip6t-firewall-gateway
View File

@ -2083,26 +2083,62 @@ fi
echononl "\t\tFTP out only"
if $allow_ftp_request_out ; then
# - (Re)define helper
# -
$ip6t -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
if $kernel_forward_between_interfaces ; then
$ip6t -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
fi
for _dev in ${ext_if_arr[@]} ; do
$ip6t -A OUTPUT -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
$ip6t -A OUTPUT -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# - Allow active FTP connections from local network
# -
#$ip6t -A INPUT -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# - Open FTP connection
$ip6t -A OUTPUT -o $_dev -p tcp --dport 21 -m state --state NEW -j ACCEPT
# - Accept (helper ftp) related connections
$ip6t -A OUTPUT -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
$ip6t -A INPUT -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
if $kernel_forward_between_interfaces && ! $permit_local_net_to_inet ; then
$ip6t -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
$ip6t -A FORWARD -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# - Open FTP connection
$ip6t -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# - Accept (helper ftp) related connections
$ip6t -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
$ip6t -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
fi
# - Allow active FTP connections from local network
# -
$ip6t -A FORWARD -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
done
echo_done
else
echo_done
echo_skipped
fi
#if $allow_ftp_request_out ; then
# for _dev in ${ext_if_arr[@]} ; do
# $ip6t -A OUTPUT -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# $ip6t -A OUTPUT -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# # - Allow active FTP connections from local network
# # -
# #$ip6t -A INPUT -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# if $kernel_forward_between_interfaces && ! $permit_local_net_to_inet ; then
# $ip6t -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# $ip6t -A FORWARD -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# fi
# # - Allow active FTP connections from local network
# # -
# $ip6t -A FORWARD -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# done
#
# echo_done
#else
# echo_done
#fi
# ---
# - FTP Service Gateway

58
ipt-firewall-gateway
View File

@ -2768,26 +2768,62 @@ fi
echononl "\t\tFTP out only"
if $allow_ftp_request_out ; then
# - (Re)define helper
# -
$ipt -A OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
if $kernel_activate_forwarding ; then
$ipt -A PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
fi
for _dev in ${ext_if_arr[@]} ; do
$ipt -A OUTPUT -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
$ipt -A OUTPUT -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# - Allow active FTP connections from local network
# -
#$ipt -A INPUT -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# - Open FTP connection
$ipt -A OUTPUT -o $_dev -p tcp --dport 21 -m state --state NEW -j ACCEPT
# - Accept (helper ftp) related connections
$ipt -A OUTPUT -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
$ipt -A INPUT -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
if $kernel_activate_forwarding && ! $permit_local_net_to_inet ; then
$ipt -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
$ipt -A FORWARD -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# - Open FTP connection
$ipt -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# - Accept (helper ftp) related connections
$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -o $_dev -p tcp --dport 1024: -j ACCEPT
$ipt -A FORWARD -m conntrack --ctstate RELATED -m helper --helper ftp -i $_dev -p tcp --dport 1024: -j ACCEPT
fi
# - Allow active FTP connections from local network
# -
$ipt -A FORWARD -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
done
echo_done
else
echo_done
echo_skipped
fi
#if $allow_ftp_request_out ; then
# for _dev in ${ext_if_arr[@]} ; do
# $ipt -A OUTPUT -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# $ipt -A OUTPUT -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# # - Allow active FTP connections from local network
# # -
# $ipt -A INPUT -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# if $kernel_activate_forwarding && ! $permit_local_net_to_inet ; then
# $ipt -A FORWARD -o $_dev -p tcp --dport 21 -m conntrack --ctstate NEW -j ACCEPT
# $ipt -A FORWARD -o $_dev -p tcp --sport $unprivports --dport $unprivports -m conntrack --ctstate NEW -j ACCEPT
# fi
# # - Allow active FTP connections from local network
# # -
# $ipt -A FORWARD -i $_dev -p tcp --sport 20 -m conntrack --ctstate NEW -j ACCEPT
# done
#
# echo_done
#else
# echo_done
#fi
# ---
# - FTP Service Gateway