From 6f30bc3446d7048b61c70011ed3489b535d8e40d Mon Sep 17 00:00:00 2001 From: Vadim Kurland Date: Thu, 17 Feb 2011 17:48:04 -0800 Subject: [PATCH] * NATCompiler_ipt.cpp (processNext): see #2097 #133 "support for inbound and outbound interface columns in iptables NAT rules". This also addresses SF feature requests 1954286 "DNAT with interface as condition not possible" and 621023 "manipulating interface in NAT rule". --- test/ipt/firewall2-6.fw.orig | 574 +++++++++++++++++++++++++++++++++++ 1 file changed, 574 insertions(+) create mode 100755 test/ipt/firewall2-6.fw.orig diff --git a/test/ipt/firewall2-6.fw.orig b/test/ipt/firewall2-6.fw.orig new file mode 100755 index 000000000..fa158efb8 --- /dev/null +++ b/test/ipt/firewall2-6.fw.orig @@ -0,0 +1,574 @@ +#!/bin/sh +# +# This is automatically generated file. DO NOT MODIFY ! +# +# Firewall Builder fwb_ipt v4.2.0.3480 +# +# Generated Thu Feb 17 17:34:30 2011 PST by vadim +# +# files: * firewall2-6.fw /etc/fw/firewall2-6.fw +# +# Compiled for iptables (any version) +# +# tests for nat rules with inbound and outbound interfaces + +# firewall2-6::: warning: Can not add virtual address 22.22.22.0 (object external_net) + + +FWBDEBUG="" + +PATH="/sbin:/usr/sbin:/bin:/usr/bin:${PATH}" +export PATH + + + +LSMOD="/sbin/lsmod" +MODPROBE="/sbin/modprobe" +IPTABLES="/sbin/iptables" +IP6TABLES="/sbin/ip6tables" +IPTABLES_RESTORE="/sbin/iptables-restore" +IP6TABLES_RESTORE="/sbin/ip6tables-restore" +IP="/sbin/ip" +IFCONFIG="/sbin/ifconfig" +VCONFIG="/sbin/vconfig" +BRCTL="/sbin/brctl" +IFENSLAVE="/sbin/ifenslave" +IPSET="/usr/sbin/ipset" +LOGGER="/usr/bin/logger" + +log() { + echo "$1" + command -v "$LOGGER" &>/dev/null && $LOGGER -p info "$1" +} + +getInterfaceVarName() { + echo $1 | sed 's/\./_/' +} + +getaddr_internal() { + dev=$1 + name=$2 + af=$3 + L=$($IP $af addr show dev $dev | sed -n '/inet/{s!.*inet6* !!;s!/.*!!p}' | sed 's/peer.*//') + test -z "$L" && { + eval "$name=''" + return + } + eval "${name}_list=\"$L\"" +} + +getaddr() { + getaddr_internal $1 $2 "-4" +} + +getaddr6() { + getaddr_internal $1 $2 "-6" +} + +# function getinterfaces is used to process wildcard interfaces +getinterfaces() { + NAME=$1 + $IP link show | grep ": $NAME" | while read L; do + OIFS=$IFS + IFS=" :" + set $L + IFS=$OIFS + echo $2 + done +} + +diff_intf() { + func=$1 + list1=$2 + list2=$3 + cmd=$4 + for intf in $list1 + do + echo $list2 | grep -q $intf || { + # $vlan is absent in list 2 + $func $intf $cmd + } + done +} + +find_program() { + PGM=$1 + command -v $PGM &>/dev/null || { + echo "$PGM not found" + exit 1 + } +} +check_tools() { + find_program $IPTABLES + find_program $IP +} +reset_iptables_v4() { + $IPTABLES -P OUTPUT DROP + $IPTABLES -P INPUT DROP + $IPTABLES -P FORWARD DROP + +cat /proc/net/ip_tables_names | while read table; do + $IPTABLES -t $table -L -n | while read c chain rest; do + if test "X$c" = "XChain" ; then + $IPTABLES -t $table -F $chain + fi + done + $IPTABLES -t $table -X +done +} + +reset_iptables_v6() { + $IP6TABLES -P OUTPUT DROP + $IP6TABLES -P INPUT DROP + $IP6TABLES -P FORWARD DROP + +cat /proc/net/ip6_tables_names | while read table; do + $IP6TABLES -t $table -L -n | while read c chain rest; do + if test "X$c" = "XChain" ; then + $IP6TABLES -t $table -F $chain + fi + done + $IP6TABLES -t $table -X +done +} + + +P2P_INTERFACE_WARNING="" + +missing_address() { + address=$1 + cmd=$2 + + oldIFS=$IFS + IFS="@" + set $address + addr=$1 + interface=$2 + IFS=$oldIFS + + + + $IP addr show dev $interface | grep -q POINTOPOINT && { + test -z "$P2P_INTERFACE_WARNING" && echo "Warning: Can not update address of interface $interface. fwbuilder can not manage addresses of point-to-point interfaces yet" + P2P_INTERFACE_WARNING="yes" + return + } + + test "$cmd" = "add" && { + echo "# Adding ip address: $interface $addr" + echo $addr | grep -q ':' && { + $FWBDEBUG $IP addr $cmd $addr dev $interface + } || { + $FWBDEBUG $IP addr $cmd $addr broadcast + dev $interface + } + } + + test "$cmd" = "del" && { + echo "# Removing ip address: $interface $addr" + $FWBDEBUG $IP addr $cmd $addr dev $interface + } + + $FWBDEBUG $IP link set $interface up +} + +list_addresses_by_scope() { + interface=$1 + scope=$2 + ignore_list=$3 + $IP addr ls dev $interface | \ + awk -v IGNORED="$ignore_list" -v SCOPE="$scope" \ + 'BEGIN { + split(IGNORED,ignored_arr); + for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;} + } + (/inet |inet6 / && $0 ~ SCOPE && !($2 in ignored_dict)) {print $2;}' | \ + while read addr; do + echo "${addr}@$interface" + done | sort +} + + +update_addresses_of_interface() { + ignore_list=$2 + set $1 + interface=$1 + shift + + FWB_ADDRS=$( + for addr in $*; do + echo "${addr}@$interface" + done | sort + ) + + CURRENT_ADDRS_ALL_SCOPES="" + CURRENT_ADDRS_GLOBAL_SCOPE="" + + $IP link show dev $interface >/dev/null 2>&1 && { + CURRENT_ADDRS_ALL_SCOPES=$(list_addresses_by_scope $interface 'scope .*' "$ignore_list") + CURRENT_ADDRS_GLOBAL_SCOPE=$(list_addresses_by_scope $interface 'scope global' "$ignore_list") + } || { + echo "# Interface $interface does not exist" + # Stop the script if we are not in test mode + test -z "$FWBDEBUG" && exit 1 + } + + diff_intf missing_address "$FWB_ADDRS" "$CURRENT_ADDRS_ALL_SCOPES" add + diff_intf missing_address "$CURRENT_ADDRS_GLOBAL_SCOPE" "$FWB_ADDRS" del +} + +clear_addresses_except_known_interfaces() { + $IP link show | sed 's/://g' | awk -v IGNORED="$*" \ + 'BEGIN { + split(IGNORED,ignored_arr); + for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;} + } + (/state/ && !($2 in ignored_dict)) {print $2;}' | \ + while read intf; do + echo "# Removing addresses not configured in fwbuilder from interface $intf" + $FWBDEBUG $IP addr flush dev $intf scope global + $FWBDEBUG $IP link set $intf down + done +} + +check_file() { + test -r "$2" || { + echo "Can not find file $2 referenced by address table object $1" + exit 1 + } +} + +check_run_time_address_table_files() { + : + +} + +load_modules() { + : + +} + +verify_interfaces() { + : + +} + +prolog_commands() { + echo "Running prolog script" + +} + +epilog_commands() { + echo "Running epilog script" + +} + +run_epilog_and_exit() { + epilog_commands + exit $1 +} + +configure_interfaces() { + : + # Configure interfaces + update_addresses_of_interface "eth0 192.168.1.1/24" "" + update_addresses_of_interface "eth1 222.222.222.222/24 222.222.222.40/24" "" + update_addresses_of_interface "eth3 33.33.33.25/29" "" + update_addresses_of_interface "eth2 33.33.33.3/29 33.33.33.4/29" "" + update_addresses_of_interface "lo 127.0.0.1/8" "" +} + +script_body() { + echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter + echo 0 > /proc/sys/net/ipv4/conf/all/accept_source_route + echo 0 > /proc/sys/net/ipv4/conf/all/accept_redirects + echo 1 > /proc/sys/net/ipv4/conf/all/log_martians + echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all + echo 1 > /proc/sys/net/ipv4/icmp_ignore_bogus_error_responses + echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout + echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_intvl + + + # ================ IPv4 + + + # ================ Table 'filter', automatic rules + $IPTABLES -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu + + # accept established sessions + $IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT + $IPTABLES -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT + $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT + # drop TCP sessions opened prior firewall restart + $IPTABLES -A INPUT -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP + $IPTABLES -A OUTPUT -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP + $IPTABLES -A FORWARD -p tcp -m tcp ! --tcp-flags SYN,RST,ACK SYN -m state --state NEW -j DROP + # drop packets that do not match any valid state and log them + $IPTABLES -N drop_invalid + $IPTABLES -A OUTPUT -m state --state INVALID -j drop_invalid + $IPTABLES -A INPUT -m state --state INVALID -j drop_invalid + $IPTABLES -A FORWARD -m state --state INVALID -j drop_invalid + $IPTABLES -A drop_invalid -j ULOG --ulog-nlgroup 1 --ulog-qthreshold 1 --ulog-prefix "INVALID state -- DENY " + $IPTABLES -A drop_invalid -j DROP + + + # ================ Table 'nat', rule set NAT + # + # Rule 0 (NAT) + # + echo "Rule 0 (NAT)" + # + # NETMAP and no -o itf + $IPTABLES -t nat -A POSTROUTING -s 192.168.1.0/24 -j NETMAP --to 22.22.22.0/24 + # + # Rule 1 (NAT) + # + echo "Rule 1 (NAT)" + # + $IPTABLES -t nat -A POSTROUTING -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 2 (NAT) + # + echo "Rule 2 (NAT)" + # + # + $IPTABLES -t nat -A POSTROUTING -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 3 (NAT) + # + echo "Rule 3 (NAT)" + # + # + $IPTABLES -t nat -A POSTROUTING -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 4 (NAT) + # + echo "Rule 4 (NAT)" + # + # should be -i eth2 -o eth1 + $IPTABLES -t nat -A POSTROUTING -i eth2 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 5 (NAT) + # + echo "Rule 5 (NAT)" + # + # should be -i eth2 -o eth1 + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 6 (NAT) + # + echo "Rule 6 (NAT)" + # + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth0 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 7 (NAT) + # + echo "Rule 7 (NAT)" + # + $IPTABLES -t nat -A POSTROUTING -i eth0 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth0 -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 8 (NAT) + # + echo "Rule 8 (NAT)" + # + $IPTABLES -t nat -A POSTROUTING -i eth0 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth0 -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth1 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + $IPTABLES -t nat -A POSTROUTING -i eth2 -o eth3 -s 192.168.1.0/24 -j SNAT --to-source 222.222.222.40 + # + # Rule 9 (NAT) + # + echo "Rule 9 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A OUTPUT -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 10 (NAT) + # + echo "Rule 10 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth1 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 11 (NAT) + # + echo "Rule 11 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth3 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 12 (NAT) + # + echo "Rule 12 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth3 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth1 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 13 (NAT) + # + echo "Rule 13 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A OUTPUT -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 14 (NAT) + # + echo "Rule 14 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth1 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 15 (NAT) + # + echo "Rule 15 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth2 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 16 (NAT) + # + echo "Rule 16 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth2 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth1 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth1 -o eth2 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + # + # Rule 17 (NAT) + # + echo "Rule 17 (NAT)" + # + $IPTABLES -t nat -A PREROUTING -i eth1 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth1 -o eth2 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth0 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + $IPTABLES -t nat -A PREROUTING -i eth3 -o eth2 -d 222.222.222.40 -j DNAT --to-destination 192.168.1.10 + + + + # ================ Table 'filter', rule set Policy + # + # Rule 0 (global) + # + echo "Rule 0 (global)" + # + # 'catch all' rule + $IPTABLES -N RULE_0 + $IPTABLES -A OUTPUT -j RULE_0 + $IPTABLES -A INPUT -j RULE_0 + $IPTABLES -A FORWARD -j RULE_0 + $IPTABLES -A RULE_0 -m limit --limit 5/second -j ULOG --ulog-nlgroup 1 --ulog-prefix "RULE 0 - DENY **" --ulog-qthreshold 1 + $IPTABLES -A RULE_0 -j DROP +} + +ip_forward() { + : + echo 1 > /proc/sys/net/ipv4/ip_forward +} + +reset_all() { + : + reset_iptables_v4 +} + +block_action() { + reset_all +} + +stop_action() { + reset_all + $IPTABLES -P OUTPUT ACCEPT + $IPTABLES -P INPUT ACCEPT + $IPTABLES -P FORWARD ACCEPT +} + +check_iptables() { + IP_TABLES="$1" + [ ! -e $IP_TABLES ] && return 151 + NF_TABLES=$(cat $IP_TABLES 2>/dev/null) + [ -z "$NF_TABLES" ] && return 152 + return 0 +} +status_action() { + check_iptables "/proc/net/ip_tables_names" + ret_ipv4=$? + check_iptables "/proc/net/ip6_tables_names" + ret_ipv6=$? + [ $ret_ipv4 -eq 0 -o $ret_ipv6 -eq 0 ] && return 0 + [ $ret_ipv4 -eq 151 -o $ret_ipv6 -eq 151 ] && { + echo "iptables modules are not loaded" + } + [ $ret_ipv4 -eq 152 -o $ret_ipv6 -eq 152 ] && { + echo "Firewall is not configured" + } + exit 3 +} + +# See how we were called. +# For backwards compatibility missing argument is equivalent to 'start' + +cmd=$1 +test -z "$cmd" && { + cmd="start" +} + +case "$cmd" in + start) + log "Activating firewall script generated Thu Feb 17 17:34:30 2011 by vadim" + check_tools + + check_run_time_address_table_files + + load_modules "nat " + configure_interfaces + verify_interfaces + + reset_all + prolog_commands + script_body + ip_forward + epilog_commands + RETVAL=$? + ;; + + stop) + stop_action + RETVAL=$? + ;; + + status) + status_action + RETVAL=$? + ;; + + block) + block_action + RETVAL=$? + ;; + + reload) + $0 stop + $0 start + RETVAL=$? + ;; + + interfaces) + configure_interfaces + RETVAL=$? + ;; + + test_interfaces) + FWBDEBUG="echo" + configure_interfaces + RETVAL=$? + ;; + + + + *) + echo "Usage $0 [start|stop|status|block|reload|interfaces|test_interfaces]" + ;; + +esac + +exit $RETVAL \ No newline at end of file