From 84cb8c445dbbdb2f6612460ecde826c58f2ed7b8 Mon Sep 17 00:00:00 2001 From: teastep Date: Fri, 6 Aug 2004 15:35:05 +0000 Subject: [PATCH] First Cut at Kernel 2.6 IPSEC Support git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@1522 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb --- Shorewall2/firewall | 74 +++++++++++++++++++++++++++++-------- Shorewall2/hosts | 3 ++ Shorewall2/releasenotes.txt | 37 +++++++++++++++++++ 3 files changed, 99 insertions(+), 15 deletions(-) diff --git a/Shorewall2/firewall b/Shorewall2/firewall index e80872bf0..3ca3fd6aa 100755 --- a/Shorewall2/firewall +++ b/Shorewall2/firewall @@ -157,7 +157,7 @@ run_iptables() { if ! iptables $@ ; then if [ -z "$stopping" ]; then - error_message "ERROR: Command \"$@\" Failed" + error_message "ERROR: Command \"iptables $@\" Failed" stop_firewall exit 2 fi @@ -188,7 +188,7 @@ run_iptables2() { run_ip() { if ! ip $@ ; then if [ -z "$stopping" ]; then - error_message "ERROR: Command \"$@\" Failed" + error_message "ERROR: Command \"ip $@\" Failed" stop_firewall exit 2 fi @@ -201,7 +201,7 @@ run_ip() { run_tc() { if ! tc $@ ; then if [ -z "$stopping" ]; then - error_message "ERROR: Command \"$@\" Failed" + error_message "ERROR: Command \"tc $@\" Failed" stop_firewall exit 2 fi @@ -606,6 +606,46 @@ verify_interface() known_interface $1 || { [ -n $BRIDGING ] && list_search $1 $all_ports ; } } +# +# Generate a match for decrypted packets +# +match_ipsec_in() # $1 = zone, $2 = host +{ + eval local hosts=\"\$${1}_ipsec_hosts\" + + list_search $2 $hosts && echo "-m policy --pol ipsec --dir in" +} + +# +# Generate a match for packets that will be encrypted +# +match_ipsec_out() # $1 = zone, $2 = host +{ + eval local hosts=\"\$${1}_ipsec_hosts\" + + list_search $2 $hosts && echo "-m policy --pol ipsec --dir out" +} + +# +# Generate a match for packets that have been decrypted and that will be encrypted +# +match_ipsec_inout() # $1 =input zone, $2 = input host, $3 = output zone, $4 = output host" +{ + local result="-m policy --pol ipsec" + eval local input_hosts=\"\$${1}_ipsec_hosts\" + eval local output_hosts=\"\$${3}_ipsec_hosts\" + + if list_search $2 $input_hosts; then + result="$result --dir in" + if list_search $4 $output_hosts; then + result="$result --dir out" + fi + echo $result + elif list_search $4 $output_hosts; then + echo "$result --dir out" + fi +} + # # # Find hosts in a given zone @@ -855,7 +895,10 @@ validate_hosts_file() { for option in $(separate_list $options) ; do case $option in - maclist|norfc1918|nobogons|blacklist|tcpflags|nosmurfs|newnotsyn|ipsec|-) + maclist|norfc1918|nobogons|blacklist|tcpflags|nosmurfs|newnotsyn|-) + ;; + ipsec) + eval ${z}_ipsec_hosts=\"\$${z}_ipsec_hosts $interface:$host\" ;; routeback) [ -z "$ports" ] && \ @@ -5598,7 +5641,7 @@ activate_rules() if havenatchain $destchain ; then run_iptables -t nat -A $sourcechain $@ -j $destchain elif [ -n "$BRIDGING" -a -f $TMP_DIR/physdev ]; then - rm -f #TMP_DIR/physdev + rm -f $TMP_DIR/physdev fi } @@ -5617,7 +5660,7 @@ activate_rules() \$${sourcechain}_rule $@ -j $destchain eval ${sourcechain}_rule=\$\(\(\$${sourcechain}_rule + 1\)\) elif [ -n "$BRIDGING" -a -f $TMP_DIR/physdev ]; then - rm -f $TMP_DIR/physdev + rm -f $TMP_DIR/physdev fi } # @@ -5671,18 +5714,18 @@ activate_rules() interface=${host%%:*} networks=${host#*:} - run_iptables -A OUTPUT -o $interface $(match_dest_hosts $networks) -j $chain1 + run_iptables -A OUTPUT -o $interface $(match_dest_hosts $networks) $(match_ipsec_out $zone $host) -j $chain1 # # Add jumps from the builtin chains for DNAT and SNAT rules # - addrulejump PREROUTING $(dnat_chain $zone) -i $interface $(match_source_hosts $networks) - addrulejump POSTROUTING $(snat_chain $zone) -o $interface $(match_dest_hosts $networks) + addrulejump PREROUTING $(dnat_chain $zone) -i $interface $(match_source_hosts $networks) $(match_ipsec_in $zone $host) + addrulejump POSTROUTING $(snat_chain $zone) -o $interface $(match_dest_hosts $networks) $(match_ipsec_out $zone $host) run_iptables -A $(input_chain $interface) $(match_source_hosts $networks) -j $chain2 [ -n "$complex" ] && \ - run_iptables -A $(forward_chain $interface) $(match_source_hosts $networks) -j $frwd_chain + run_iptables -A $(forward_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j $frwd_chain case $networks in *.*.*.*) @@ -5747,22 +5790,22 @@ activate_rules() # routeback was specified for this host group # if [ $zone != $zone1 -o $num_ifaces -gt 1 ] || list_search $host1 $routeback ; then - run_iptables -A $frwd_chain -o $interface1 $(match_dest_hosts $networks1) -j $chain + run_iptables -A $frwd_chain -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_out $zone1 $host1) -j $chain fi done else for host in $source_hosts; do interface=${host%%:*} networks=${host#*:} - + chain1=$(forward_chain $interface) - + for host1 in $dest_hosts; do interface1=${host1%%:*} networks1=${host1#*:} if [ "$host" != "$host1" ] || list_search $host $routeback; then - run_iptables -A $chain1 $(match_source_hosts $networks) -o $interface1 $(match_dest_hosts $networks1) -j $chain + run_iptables -A $chain1 $(match_source_hosts $networks) -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_inout $zone $host $zone1 $host1) -j $chain fi done done @@ -6338,6 +6381,8 @@ do_initialize() { RESTOREBASE= TMP_DIR= + ALL_INTERFACES= + stopping= have_mutex= masq_seq=1 @@ -6524,7 +6569,6 @@ do_initialize() { fi rm -f $TMP_DIR/physdev - } # diff --git a/Shorewall2/hosts b/Shorewall2/hosts index 6badb49b8..afc1b75d4 100644 --- a/Shorewall2/hosts +++ b/Shorewall2/hosts @@ -124,5 +124,8 @@ # This option has no effect if # NEWNOTSYN=Yes. # +# ipsec - The zone is accessed over a +# kernel 2.6 ipsec tunnel +# #ZONE HOST(S) OPTIONS #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS LINE -- DO NOT REMOVE diff --git a/Shorewall2/releasenotes.txt b/Shorewall2/releasenotes.txt index 12efd50ab..fdd1ad421 100755 --- a/Shorewall2/releasenotes.txt +++ b/Shorewall2/releasenotes.txt @@ -172,3 +172,40 @@ New Features: b) It causes /etc/shorewall/shorewall.conf to be modified so that it won't be replaced by upgrades using RPM. + +7) Some additional support has been added for the 2.6 Kernel IPSEC + implementation. To use this support, you must have installed the + IPSEC policy match patch from Patch-0-Matic-ng. That patch affects + both your kernel and iptables. + + This new Shorewall support is enabled through use of the 'ipsec' + option in /etc/shorewall/hosts. + + Example: + + Under 2.4 Kernel FreeS/Wan: + + /etc/shorewall/zones: + + net Net The big bad Internet + vpn VPN Remote Network + + /etc/shorewall/interfaces: + + net eth0 ... + vpn ipsec0 ... + + Under 2.6 Kernel with this new support: + + /etc/shorewall/zones (note the change of order): + + vpn VPN Remote Network + net Net The big bad Internet + + /etc/shorewall/interfaces: + + net eth0 ... + + /etc/shorewall/hosts: + + vpn eth0:0.0.0.0/0 ipsec