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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
This commit is contained in:
teastep
parent
accc6a031f
commit
84cb8c445d
@ -157,7 +157,7 @@ run_iptables() {
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if ! iptables $@ ; then
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if [ -z "$stopping" ]; then
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error_message "ERROR: Command \"$@\" Failed"
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error_message "ERROR: Command \"iptables $@\" Failed"
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stop_firewall
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exit 2
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fi
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@ -188,7 +188,7 @@ run_iptables2() {
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run_ip() {
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if ! ip $@ ; then
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if [ -z "$stopping" ]; then
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error_message "ERROR: Command \"$@\" Failed"
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error_message "ERROR: Command \"ip $@\" Failed"
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stop_firewall
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exit 2
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fi
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@ -201,7 +201,7 @@ run_ip() {
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run_tc() {
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if ! tc $@ ; then
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if [ -z "$stopping" ]; then
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error_message "ERROR: Command \"$@\" Failed"
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error_message "ERROR: Command \"tc $@\" Failed"
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stop_firewall
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exit 2
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fi
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@ -606,6 +606,46 @@ verify_interface()
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known_interface $1 || { [ -n $BRIDGING ] && list_search $1 $all_ports ; }
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}
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#
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# Generate a match for decrypted packets
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#
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match_ipsec_in() # $1 = zone, $2 = host
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{
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eval local hosts=\"\$${1}_ipsec_hosts\"
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list_search $2 $hosts && echo "-m policy --pol ipsec --dir in"
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}
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#
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# Generate a match for packets that will be encrypted
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#
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match_ipsec_out() # $1 = zone, $2 = host
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{
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eval local hosts=\"\$${1}_ipsec_hosts\"
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list_search $2 $hosts && echo "-m policy --pol ipsec --dir out"
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}
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#
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# Generate a match for packets that have been decrypted and that will be encrypted
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#
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match_ipsec_inout() # $1 =input zone, $2 = input host, $3 = output zone, $4 = output host"
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{
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local result="-m policy --pol ipsec"
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eval local input_hosts=\"\$${1}_ipsec_hosts\"
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eval local output_hosts=\"\$${3}_ipsec_hosts\"
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if list_search $2 $input_hosts; then
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result="$result --dir in"
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if list_search $4 $output_hosts; then
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result="$result --dir out"
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fi
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echo $result
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elif list_search $4 $output_hosts; then
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echo "$result --dir out"
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fi
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}
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#
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#
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# Find hosts in a given zone
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@ -855,7 +895,10 @@ validate_hosts_file() {
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for option in $(separate_list $options) ; do
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case $option in
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maclist|norfc1918|nobogons|blacklist|tcpflags|nosmurfs|newnotsyn|ipsec|-)
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maclist|norfc1918|nobogons|blacklist|tcpflags|nosmurfs|newnotsyn|-)
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;;
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ipsec)
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eval ${z}_ipsec_hosts=\"\$${z}_ipsec_hosts $interface:$host\"
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;;
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routeback)
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[ -z "$ports" ] && \
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@ -5598,7 +5641,7 @@ activate_rules()
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if havenatchain $destchain ; then
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run_iptables -t nat -A $sourcechain $@ -j $destchain
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elif [ -n "$BRIDGING" -a -f $TMP_DIR/physdev ]; then
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rm -f #TMP_DIR/physdev
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rm -f $TMP_DIR/physdev
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fi
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}
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@ -5617,7 +5660,7 @@ activate_rules()
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\$${sourcechain}_rule $@ -j $destchain
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eval ${sourcechain}_rule=\$\(\(\$${sourcechain}_rule + 1\)\)
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elif [ -n "$BRIDGING" -a -f $TMP_DIR/physdev ]; then
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rm -f $TMP_DIR/physdev
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rm -f $TMP_DIR/physdev
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fi
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}
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#
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@ -5671,18 +5714,18 @@ activate_rules()
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interface=${host%%:*}
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networks=${host#*:}
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run_iptables -A OUTPUT -o $interface $(match_dest_hosts $networks) -j $chain1
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run_iptables -A OUTPUT -o $interface $(match_dest_hosts $networks) $(match_ipsec_out $zone $host) -j $chain1
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#
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# Add jumps from the builtin chains for DNAT and SNAT rules
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#
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addrulejump PREROUTING $(dnat_chain $zone) -i $interface $(match_source_hosts $networks)
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addrulejump POSTROUTING $(snat_chain $zone) -o $interface $(match_dest_hosts $networks)
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addrulejump PREROUTING $(dnat_chain $zone) -i $interface $(match_source_hosts $networks) $(match_ipsec_in $zone $host)
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addrulejump POSTROUTING $(snat_chain $zone) -o $interface $(match_dest_hosts $networks) $(match_ipsec_out $zone $host)
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run_iptables -A $(input_chain $interface) $(match_source_hosts $networks) -j $chain2
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[ -n "$complex" ] && \
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run_iptables -A $(forward_chain $interface) $(match_source_hosts $networks) -j $frwd_chain
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run_iptables -A $(forward_chain $interface) $(match_source_hosts $networks) $(match_ipsec_in $zone $host) -j $frwd_chain
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case $networks in
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*.*.*.*)
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@ -5747,22 +5790,22 @@ activate_rules()
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# routeback was specified for this host group
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#
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if [ $zone != $zone1 -o $num_ifaces -gt 1 ] || list_search $host1 $routeback ; then
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run_iptables -A $frwd_chain -o $interface1 $(match_dest_hosts $networks1) -j $chain
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run_iptables -A $frwd_chain -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_out $zone1 $host1) -j $chain
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fi
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done
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else
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for host in $source_hosts; do
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interface=${host%%:*}
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networks=${host#*:}
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chain1=$(forward_chain $interface)
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for host1 in $dest_hosts; do
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interface1=${host1%%:*}
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networks1=${host1#*:}
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if [ "$host" != "$host1" ] || list_search $host $routeback; then
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run_iptables -A $chain1 $(match_source_hosts $networks) -o $interface1 $(match_dest_hosts $networks1) -j $chain
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run_iptables -A $chain1 $(match_source_hosts $networks) -o $interface1 $(match_dest_hosts $networks1) $(match_ipsec_inout $zone $host $zone1 $host1) -j $chain
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fi
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done
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done
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@ -6338,6 +6381,8 @@ do_initialize() {
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RESTOREBASE=
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TMP_DIR=
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ALL_INTERFACES=
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stopping=
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have_mutex=
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masq_seq=1
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@ -6524,7 +6569,6 @@ do_initialize() {
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fi
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rm -f $TMP_DIR/physdev
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}
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#
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@ -124,5 +124,8 @@
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# This option has no effect if
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# NEWNOTSYN=Yes.
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#
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# ipsec - The zone is accessed over a
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# kernel 2.6 ipsec tunnel
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#
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#ZONE HOST(S) OPTIONS
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#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS LINE -- DO NOT REMOVE
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@ -172,3 +172,40 @@ New Features:
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b) It causes /etc/shorewall/shorewall.conf to be modified so that
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it won't be replaced by upgrades using RPM.
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7) Some additional support has been added for the 2.6 Kernel IPSEC
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implementation. To use this support, you must have installed the
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IPSEC policy match patch from Patch-0-Matic-ng. That patch affects
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both your kernel and iptables.
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This new Shorewall support is enabled through use of the 'ipsec'
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option in /etc/shorewall/hosts.
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Example:
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Under 2.4 Kernel FreeS/Wan:
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/etc/shorewall/zones:
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net Net The big bad Internet
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vpn VPN Remote Network
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/etc/shorewall/interfaces:
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net eth0 ...
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vpn ipsec0 ...
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Under 2.6 Kernel with this new support:
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/etc/shorewall/zones (note the change of order):
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vpn VPN Remote Network
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net Net The big bad Internet
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/etc/shorewall/interfaces:
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net eth0 ...
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/etc/shorewall/hosts:
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vpn eth0:0.0.0.0/0 ipsec
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