--- /dev/null
+The roadwarriors <b>alice</b> and <b>venus</b> sitting behind the NAT router <b>moon</b> set up
+tunnels to gateway <b>sun</b>. UDP encapsulation is used to traverse the NAT router.
+Since both roadwarriors possess the same 10.1.0.0/25 subnet, gateway <b>sun</b> uses Source NAT
+after ESP decryption to map these subnets to 10.3.0.10 and 10.3.0.20, respectively.
+<p/>
+In order to differentiate between the tunnels to <b>alice</b> and <b>venus</b>, respectively,
+<b>XFRM marks</b> are defined for both the inbound and outbound IPsec SAs and policies using
+the <b>mark</b> parameter in ipsec.conf.
+<p/>
+<b>iptables -t mangle</b> rules are then used in the PREROUTING chain to mark the traffic to
+and from <b>alice</b> and <b>venus</b>, respectively.
+<p/>
+The script designated by <b>leftupdown=/etc/mark_updown</b> automatically inserts
+iptables mangle rules that mark the inbound ESP_IN_UDP packets as well as iptables IPsec-policy rules
+that let pass the tunneled traffic. In order to test the tunnel, the NAT-ed hosts <b>alice</b>
+and <b>venus</b> ping the client <b>bob</b> behind the gateway <b>sun</b>.
--- /dev/null
+alice::ipsec status::nat-t.*STATE_QUICK_I2.*IPsec SA established::YES
+venus::ipsec status::nat-t.*STATE_QUICK_I2.*IPsec SA established::YES
+sun::ipsec status::alice.*STATE_QUICK_R2.*IPsec SA established::YES
+sun::ipsec status::alice.*alice@strongswan.org::YES
+sun::ipsec status::venus.*STATE_QUICK_R2.*IPsec SA established::YES
+sun::ipsec status::venus.*venus.strongswan.org::YES
+sun::ipsec statusall::alice.*10.2.0.0/16===.*===10.1.0.0/25::YES
+sun::ipsec statusall::venus.*10.2.0.0/16===.*===10.1.0.0/25::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+venus::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+moon::tcpdump::IP moon.strongswan.org.4510.* > sun.strongswan.org.ipsec-nat-t: UDP::YES
+moon::tcpdump::IP moon.strongswan.org.4520.* > sun.strongswan.org.ipsec-nat-t: UDP::YES
+moon::tcpdump::IP sun.strongswan.org.ipsec-nat-t > moon.strongswan.org.4510.*: UDP::YES
+moon::tcpdump::IP sun.strongswan.org.ipsec-nat-t > moon.strongswan.org.4520.*: UDP::YES
+bob::tcpdump::10.3.0.10 > bob.strongswan.org: ICMP echo request::YES
+bob::tcpdump::10.3.0.20 > bob.strongswan.org: ICMP echo request::YES
+bob::tcpdump::bob.strongswan.org > 10.3.0.10: ICMP echo reply::YES
+bob::tcpdump::bob.strongswan.org > 10.3.0.20: ICMP echo reply::YES
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug=control
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ nat_traversal=yes
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn nat-t
+ left=%defaultroute
+ leftsubnet=10.1.0.0/25
+ leftcert=aliceCert.pem
+ leftid=alice@strongswan.org
+ leftfirewall=yes
+ lefthostaccess=yes
+ right=PH_IP_SUN
+ rightid=@sun.strongswan.org
+ rightsubnet=10.2.0.0/16
+ auto=add
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug="control parsing" #parsing to get knl 2 messages
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ nat_traversal=yes
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn alice
+ rightid=alice@strongswan.org
+ mark=10/0xffffffff
+ also=sun
+ auto=add
+
+conn venus
+ rightid=@venus.strongswan.org
+ mark=20 #0xffffffff is used by default
+ also=sun
+ auto=add
+
+conn sun
+ left=PH_IP_SUN
+ leftcert=sunCert.pem
+ leftid=@sun.strongswan.org
+ leftsubnet=10.2.0.0/16
+ leftupdown=/etc/mark_updown
+ right=%any
+ rightsubnet=10.1.0.0/25
--- /dev/null
+#! /bin/sh
+# updown script setting inbound marks on ESP traffic in the mangle chain
+#
+# Copyright (C) 2003-2004 Nigel Meteringham
+# Copyright (C) 2003-2004 Tuomo Soini
+# Copyright (C) 2002-2004 Michael Richardson
+# Copyright (C) 2005-2010 Andreas Steffen <andreas.steffen@strongswan.org>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+# for more details.
+
+# CAUTION: Installing a new version of strongSwan will install a new
+# copy of this script, wiping out any custom changes you make. If
+# you need changes, make a copy of this under another name, and customize
+# that, and use the (left/right)updown parameters in ipsec.conf to make
+# strongSwan use yours instead of this default one.
+
+# things that this script gets (from ipsec_pluto(8) man page)
+#
+# PLUTO_VERSION
+# indicates what version of this interface is being
+# used. This document describes version 1.1. This
+# is upwardly compatible with version 1.0.
+#
+# PLUTO_VERB
+# specifies the name of the operation to be performed
+# (prepare-host, prepare-client, up-host, up-client,
+# down-host, or down-client). If the address family
+# for security gateway to security gateway communica-
+# tions is IPv6, then a suffix of -v6 is added to the
+# verb.
+#
+# PLUTO_CONNECTION
+# is the name of the connection for which we are
+# routing.
+#
+# PLUTO_NEXT_HOP
+# is the next hop to which packets bound for the peer
+# must be sent.
+#
+# PLUTO_INTERFACE
+# is the name of the ipsec interface to be used.
+#
+# PLUTO_REQID
+# is the requid of the ESP policy
+#
+# PLUTO_ME
+# is the IP address of our host.
+#
+# PLUTO_MY_ID
+# is the ID of our host.
+#
+# PLUTO_MY_CLIENT
+# is the IP address / count of our client subnet. If
+# the client is just the host, this will be the
+# host's own IP address / max (where max is 32 for
+# IPv4 and 128 for IPv6).
+#
+# PLUTO_MY_CLIENT_NET
+# is the IP address of our client net. If the client
+# is just the host, this will be the host's own IP
+# address.
+#
+# PLUTO_MY_CLIENT_MASK
+# is the mask for our client net. If the client is
+# just the host, this will be 255.255.255.255.
+#
+# PLUTO_MY_SOURCEIP
+# if non-empty, then the source address for the route will be
+# set to this IP address.
+#
+# PLUTO_MY_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_MY_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on our side.
+#
+# PLUTO_PEER
+# is the IP address of our peer.
+#
+# PLUTO_PEER_ID
+# is the ID of our peer.
+#
+# PLUTO_PEER_CA
+# is the CA which issued the cert of our peer.
+#
+# PLUTO_PEER_CLIENT
+# is the IP address / count of the peer's client sub-
+# net. If the client is just the peer, this will be
+# the peer's own IP address / max (where max is 32
+# for IPv4 and 128 for IPv6).
+#
+# PLUTO_PEER_CLIENT_NET
+# is the IP address of the peer's client net. If the
+# client is just the peer, this will be the peer's
+# own IP address.
+#
+# PLUTO_PEER_CLIENT_MASK
+# is the mask for the peer's client net. If the
+# client is just the peer, this will be
+# 255.255.255.255.
+#
+# PLUTO_PEER_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_PEER_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on the peer side.
+#
+# PLUTO_XAUTH_ID
+# is an optional user ID employed by the XAUTH protocol
+#
+# PLUTO_MARK_IN
+# is an optional XFRM mark set on the inbound IPsec SA
+#
+# PLUTO_MARK_OUT
+# is an optional XFRM mark set on the outbound IPsec SA
+#
+# PLUTO_UDP_ENC
+# contains the remote UDP port in the case of ESP_IN_UDP
+# encapsulation
+#
+
+# define a minimum PATH environment in case it is not set
+PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/sbin"
+export PATH
+
+# uncomment to log VPN connections
+VPN_LOGGING=1
+#
+# tag put in front of each log entry:
+TAG=vpn
+#
+# syslog facility and priority used:
+FAC_PRIO=local0.notice
+#
+# to create a special vpn logging file, put the following line into
+# the syslog configuration file /etc/syslog.conf:
+#
+# local0.notice -/var/log/vpn
+
+# in order to use source IP routing the Linux kernel options
+# CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_MULTIPLE_TABLES
+# must be enabled
+#
+# special routing table for sourceip routes
+SOURCEIP_ROUTING_TABLE=220
+#
+# priority of the sourceip routing table
+SOURCEIP_ROUTING_TABLE_PRIO=220
+
+# check interface version
+case "$PLUTO_VERSION" in
+1.[0|1]) # Older Pluto?!? Play it safe, script may be using new features.
+ echo "$0: obsolete interface version \`$PLUTO_VERSION'," >&2
+ echo "$0: called by obsolete Pluto?" >&2
+ exit 2
+ ;;
+1.*) ;;
+*) echo "$0: unknown interface version \`$PLUTO_VERSION'" >&2
+ exit 2
+ ;;
+esac
+
+# check parameter(s)
+case "$1:$*" in
+':') # no parameters
+ ;;
+iptables:iptables) # due to (left/right)firewall; for default script only
+ ;;
+custom:*) # custom parameters (see above CAUTION comment)
+ ;;
+*) echo "$0: unknown parameters \`$*'" >&2
+ exit 2
+ ;;
+esac
+
+# utility functions for route manipulation
+# Meddling with this stuff should not be necessary and requires great care.
+uproute() {
+ doroute add
+ ip route flush cache
+}
+downroute() {
+ doroute delete
+ ip route flush cache
+}
+
+addsource() {
+ st=0
+ if ! ip -o route get ${PLUTO_MY_SOURCEIP%/*} | grep -q ^local
+ then
+ it="ip addr add ${PLUTO_MY_SOURCEIP%/*}/32 dev $PLUTO_INTERFACE"
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: addsource \`$it' failed ($oops)" >&2
+ fi
+ fi
+ return $st
+}
+
+doroute() {
+ st=0
+
+ if [ -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ for dir in /etc/sysconfig /etc/conf.d; do
+ if [ -f "$dir/defaultsource" ]
+ then
+ . "$dir/defaultsource"
+ fi
+ done
+
+ if [ -n "$DEFAULTSOURCE" ]
+ then
+ PLUTO_MY_SOURCEIP=$DEFAULTSOURCE
+ fi
+ fi
+
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # leave because no route entry is required
+ return $st
+ fi
+
+ parms1="$PLUTO_PEER_CLIENT"
+
+ if [ -n "$PLUTO_NEXT_HOP" ]
+ then
+ parms2="via $PLUTO_NEXT_HOP"
+ else
+ parms2="via $PLUTO_PEER"
+ fi
+ parms2="$parms2 dev $PLUTO_INTERFACE"
+
+ parms3=
+ if [ -n "$PLUTO_MY_SOURCEIP" ]
+ then
+ if test "$1" = "add"
+ then
+ addsource
+ if ! ip rule list | grep -q "lookup $SOURCEIP_ROUTING_TABLE"
+ then
+ ip rule add pref $SOURCEIP_ROUTING_TABLE_PRIO table $SOURCEIP_ROUTING_TABLE
+ fi
+ fi
+ parms3="$parms3 src ${PLUTO_MY_SOURCEIP%/*} table $SOURCEIP_ROUTING_TABLE"
+ fi
+
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # opportunistic encryption work around
+ # need to provide route that eclipses default, without
+ # replacing it.
+ it="ip route $1 0.0.0.0/1 $parms2 $parms3 &&
+ ip route $1 128.0.0.0/1 $parms2 $parms3"
+ ;;
+ *) it="ip route $1 $parms1 $parms2 $parms3"
+ ;;
+ esac
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: doroute \`$it' failed ($oops)" >&2
+ fi
+ return $st
+}
+
+# in the presence of KLIPS and ipsecN interfaces do not use IPSEC_POLICY
+if [ `echo "$PLUTO_INTERFACE" | grep "ipsec"` ]
+then
+ KLIPS=1
+ IPSEC_POLICY_IN=""
+ IPSEC_POLICY_OUT=""
+else
+ KLIPS=
+ IPSEC_POLICY="-m policy --pol ipsec --proto esp --reqid $PLUTO_REQID"
+ IPSEC_POLICY_IN="$IPSEC_POLICY --dir in"
+ IPSEC_POLICY_OUT="$IPSEC_POLICY --dir out"
+fi
+
+# is there an inbound mark to be set?
+if [ -n "$PLUTO_MARK_IN" ]
+then
+ if [ -n "$PLUTO_UDP_ENC" ]
+ then
+ SET_MARK="-p udp --sport $PLUTO_UDP_ENC"
+ else
+ SET_MARK="-p esp"
+ fi
+ SET_MARK="$SET_MARK -s $PLUTO_PEER -j MARK --set-mark $PLUTO_MARK_IN"
+fi
+
+# are there port numbers?
+if [ "$PLUTO_MY_PORT" != 0 ]
+then
+ S_MY_PORT="--sport $PLUTO_MY_PORT"
+ D_MY_PORT="--dport $PLUTO_MY_PORT"
+fi
+if [ "$PLUTO_PEER_PORT" != 0 ]
+then
+ S_PEER_PORT="--sport $PLUTO_PEER_PORT"
+ D_PEER_PORT="--dport $PLUTO_PEER_PORT"
+fi
+
+# resolve octal escape sequences
+PLUTO_MY_ID=`printf "$PLUTO_MY_ID"`
+PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"`
+
+# the big choice
+case "$PLUTO_VERB:$1" in
+prepare-host:*|prepare-client:*)
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # exit because no route will be added,
+ # so that existing routes can stay
+ exit 0
+ fi
+
+ # delete possibly-existing route (preliminary to adding a route)
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # need to provide route that eclipses default, without
+ # replacing it.
+ parms1="0.0.0.0/1"
+ parms2="128.0.0.0/1"
+ it="ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1"
+ oops="`ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1`"
+ ;;
+ *)
+ parms="$PLUTO_PEER_CLIENT"
+ it="ip route delete $parms 2>&1"
+ oops="`ip route delete $parms 2>&1`"
+ ;;
+ esac
+ status="$?"
+ if test " $oops" = " " -a " $status" != " 0"
+ then
+ oops="silent error, exit status $status"
+ fi
+ case "$oops" in
+ *'RTNETLINK answers: No such process'*)
+ # This is what route (currently -- not documented!) gives
+ # for "could not find such a route".
+ oops=
+ status=0
+ ;;
+ esac
+ if test " $oops" != " " -o " $status" != " 0"
+ then
+ echo "$0: \`$it' failed ($oops)" >&2
+ fi
+ exit $status
+ ;;
+route-host:*|route-client:*)
+ # connection to me or my client subnet being routed
+ uproute
+ ;;
+unroute-host:*|unroute-client:*)
+ # connection to me or my client subnet being unrouted
+ downroute
+ ;;
+up-host:)
+ # connection to me coming up
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -A PREROUTING $SET_MARK
+ fi
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+down-host:)
+ # connection to me going down
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -D PREROUTING $SET_MARK
+ fi
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+up-client:)
+ # connection to my client subnet coming up
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -A PREROUTING $SET_MARK
+ fi
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -I FORWARD 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -I FORWARD 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+down-client:)
+ # connection to my client subnet going down
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -D PREROUTING $SET_MARK
+ fi
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -D FORWARD -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -D FORWARD -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+*) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2
+ exit 1
+ ;;
+esac
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug=control
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ nat_traversal=yes
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn nat-t
+ left=%defaultroute
+ leftsubnet=10.1.0.0/25
+ leftcert=venusCert.pem
+ leftid=@venus.strongswan.org
+ leftfirewall=yes
+ lefthostaccess=yes
+ right=PH_IP_SUN
+ rightid=@sun.strongswan.org
+ rightsubnet=10.2.0.0/16
+ auto=add
--- /dev/null
+sun::iptables -t mangle -v -n -L PREROUTING
+sun::ipsec stop
+alice::ipsec stop
+venus::ipsec stop
+alice::/etc/init.d/iptables stop 2> /dev/null
+venus::/etc/init.d/iptables stop 2> /dev/null
+sun::/etc/init.d/iptables stop 2> /dev/null
+moon::iptables -t nat -F
+moon::conntrack -F
+sun::conntrack -F
+sun::rm /etc/mark_updown
--- /dev/null
+alice::/etc/init.d/iptables start 2> /dev/null
+venus::/etc/init.d/iptables start 2> /dev/null
+sun::/etc/init.d/iptables start 2> /dev/null
+moon::echo 1 > /proc/sys/net/ipv4/ip_forward
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p tcp -j SNAT --to PH_IP_MOON
+moon::iptables -t nat -A POSTROUTING -o eth0 -s PH_IP_ALICE -p udp --sport 500 -j SNAT --to PH_IP_MOON:510
+moon::iptables -t nat -A POSTROUTING -o eth0 -s PH_IP_VENUS -p udp --sport 500 -j SNAT --to PH_IP_MOON:520
+moon::iptables -t nat -A POSTROUTING -o eth0 -s PH_IP_ALICE -p udp --sport 4500 -j SNAT --to PH_IP_MOON:4510
+moon::iptables -t nat -A POSTROUTING -o eth0 -s PH_IP_VENUS -p udp --sport 4500 -j SNAT --to PH_IP_MOON:4520
+sun::iptables -t nat -A POSTROUTING -o eth1 -m mark --mark 10 -j SNAT --to 10.3.0.10
+sun::iptables -t nat -A POSTROUTING -o eth1 -m mark --mark 20 -j SNAT --to 10.3.0.20
+sun::iptables -t mangle -A PREROUTING -d 10.3.0.10 -j MARK --set-mark 10
+sun::iptables -t mangle -A PREROUTING -d 10.3.0.20 -j MARK --set-mark 20
+alice::ipsec start
+venus::ipsec start
+sun::ipsec start
+alice::sleep 2
+alice::ipsec up nat-t
+venus::sleep 2
+venus::ipsec up nat-t
+venus::sleep 2
--- /dev/null
+#!/bin/bash
+#
+# This configuration file provides information on the
+# UML instances used for this test
+
+# All UML instances that are required for this test
+#
+UMLHOSTS="alice venus moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-v-m-w-s-b.png"
+
+# UML instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon bob"
+
+# UML instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="alice venus sun"
--- /dev/null
+The roadwarriors <b>alice</b> and <b>venus</b> sitting behind the router <b>moon</b> set up
+tunnels to gateway <b>sun</b>. Since both roadwarriors possess the same 10.1.0.0/25 subnet,
+gateway <b>sun</b> uses Source NAT after ESP decryption to map these subnets to 10.3.0.10
+and 10.3.0.20, respectively.
+<p/>
+In order to differentiate between the tunnels to <b>alice</b> and <b>venus</b>, respectively,
+<b>XFRM marks</b> are defined for both the inbound and outbound IPsec SAs and policies using
+the <b>mark_in</b> and <b>mark_out</b> parameters in ipsec.conf.
+<p/>
+<b>iptables -t mangle</b> rules are then used in the PREROUTING chain to mark the traffic to
+and from <b>alice</b> and <b>venus</b>, respectively.
+<p/>
+The script designated by <b>leftupdown=/etc/mark_updown</b> automatically inserts
+iptables mangle rules that mark the inbound ESP packets as well as iptables IPsec-policy rules
+that let pass the tunneled traffic. In order to test the tunnel, the hosts <b>alice</b>
+and <b>venus</b> ping the client <b>bob</b> behind the gateway <b>sun</b>.
--- /dev/null
+alice::ipsec status::home.*STATE_QUICK_I2.*IPsec SA established::YES
+venus::ipsec status::home.*STATE_QUICK_I2.*IPsec SA established::YES
+sun::ipsec status::alice.*STATE_QUICK_R2.*IPsec SA established::YES
+sun::ipsec status::alice.*alice@strongswan.org::YES
+sun::ipsec status::venus.*STATE_QUICK_R2.*IPsec SA established::YES
+sun::ipsec status::venus.*venus.strongswan.org::YES
+sun::ipsec statusall::alice.*10.2.0.0/16===.*===10.1.0.0/25::YES
+sun::ipsec statusall::venus.*10.2.0.0/16===.*===10.1.0.0/25::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+venus::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+moon::tcpdump::IP alice.strongswan.org > sun.strongswan.org: ESP::YES
+moon::tcpdump::IP venus.strongswan.org > sun.strongswan.org: ESP::YES
+moon::tcpdump::IP sun.strongswan.org > alice.strongswan.org: ESP::YES
+moon::tcpdump::IP sun.strongswan.org > venus.strongswan.org: ESP::YES
+bob::tcpdump::10.3.0.10 > bob.strongswan.org: ICMP echo request::YES
+bob::tcpdump::10.3.0.20 > bob.strongswan.org: ICMP echo request::YES
+bob::tcpdump::bob.strongswan.org > 10.3.0.10: ICMP echo reply::YES
+bob::tcpdump::bob.strongswan.org > 10.3.0.20: ICMP echo reply::YES
--- /dev/null
+#!/sbin/runscript
+# Copyright 1999-2004 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+opts="start stop reload"
+
+depend() {
+ before net
+ need logger
+}
+
+start() {
+ ebegin "Starting firewall"
+
+ # default policy is DROP
+ /sbin/iptables -P INPUT DROP
+ /sbin/iptables -P OUTPUT DROP
+ /sbin/iptables -P FORWARD DROP
+
+ # allow ESP
+ iptables -A INPUT -i eth0 -p 50 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p 50 -j ACCEPT
+
+ # allow IKE
+ iptables -A INPUT -i eth0 -p udp --sport 500 --dport 500 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p udp --dport 500 --sport 500 -j ACCEPT
+
+ # allow MOBIKE
+ iptables -A INPUT -i eth0 -p udp --sport 4500 --dport 4500 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p udp --dport 4500 --sport 4500 -j ACCEPT
+
+ # allow crl fetch from winnetou
+ iptables -A INPUT -i eth0 -p tcp --sport 80 -s PH_IP_WINNETOU -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p tcp --dport 80 -d PH_IP_WINNETOU -j ACCEPT
+
+ # allow ssh
+ iptables -A INPUT -p tcp --dport 22 -j ACCEPT
+ iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT
+
+ eend $?
+}
+
+stop() {
+ ebegin "Stopping firewall"
+ for a in `cat /proc/net/ip_tables_names`; do
+ /sbin/iptables -F -t $a
+ /sbin/iptables -X -t $a
+
+ if [ $a == nat ]; then
+ /sbin/iptables -t nat -P PREROUTING ACCEPT
+ /sbin/iptables -t nat -P POSTROUTING ACCEPT
+ /sbin/iptables -t nat -P OUTPUT ACCEPT
+ elif [ $a == mangle ]; then
+ /sbin/iptables -t mangle -P PREROUTING ACCEPT
+ /sbin/iptables -t mangle -P INPUT ACCEPT
+ /sbin/iptables -t mangle -P FORWARD ACCEPT
+ /sbin/iptables -t mangle -P OUTPUT ACCEPT
+ /sbin/iptables -t mangle -P POSTROUTING ACCEPT
+ elif [ $a == filter ]; then
+ /sbin/iptables -t filter -P INPUT ACCEPT
+ /sbin/iptables -t filter -P FORWARD ACCEPT
+ /sbin/iptables -t filter -P OUTPUT ACCEPT
+ fi
+ done
+ eend $?
+}
+
+reload() {
+ ebegin "Flushing firewall"
+ for a in `cat /proc/net/ip_tables_names`; do
+ /sbin/iptables -F -t $a
+ /sbin/iptables -X -t $a
+ done;
+ eend $?
+ start
+}
+
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug=control
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn home
+ left=%defaultroute
+ leftsubnet=10.1.0.0/25
+ leftcert=aliceCert.pem
+ leftid=alice@strongswan.org
+ leftfirewall=yes
+ lefthostaccess=yes
+ right=PH_IP_SUN
+ rightid=@sun.strongswan.org
+ rightsubnet=10.2.0.0/16
+ auto=add
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug="control"
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn alice
+ rightid=alice@strongswan.org
+ mark_in=10/0xffffffff
+ mark_out=11/0xffffffff
+ also=sun
+ auto=add
+
+conn venus
+ rightid=@venus.strongswan.org
+ mark_in=20 #0xffffffff is used by default
+ mark_out=21 #0xffffffff is used by default
+ also=sun
+ auto=add
+
+conn sun
+ left=PH_IP_SUN
+ leftcert=sunCert.pem
+ leftid=@sun.strongswan.org
+ leftsubnet=10.2.0.0/16
+ leftupdown=/etc/mark_updown
+ right=%any
+ rightsubnet=10.1.0.0/25
--- /dev/null
+#! /bin/sh
+# updown script setting inbound marks on ESP traffic in the mangle chain
+#
+# Copyright (C) 2003-2004 Nigel Meteringham
+# Copyright (C) 2003-2004 Tuomo Soini
+# Copyright (C) 2002-2004 Michael Richardson
+# Copyright (C) 2005-2010 Andreas Steffen <andreas.steffen@strongswan.org>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+# for more details.
+
+# CAUTION: Installing a new version of strongSwan will install a new
+# copy of this script, wiping out any custom changes you make. If
+# you need changes, make a copy of this under another name, and customize
+# that, and use the (left/right)updown parameters in ipsec.conf to make
+# strongSwan use yours instead of this default one.
+
+# things that this script gets (from ipsec_pluto(8) man page)
+#
+# PLUTO_VERSION
+# indicates what version of this interface is being
+# used. This document describes version 1.1. This
+# is upwardly compatible with version 1.0.
+#
+# PLUTO_VERB
+# specifies the name of the operation to be performed
+# (prepare-host, prepare-client, up-host, up-client,
+# down-host, or down-client). If the address family
+# for security gateway to security gateway communica-
+# tions is IPv6, then a suffix of -v6 is added to the
+# verb.
+#
+# PLUTO_CONNECTION
+# is the name of the connection for which we are
+# routing.
+#
+# PLUTO_NEXT_HOP
+# is the next hop to which packets bound for the peer
+# must be sent.
+#
+# PLUTO_INTERFACE
+# is the name of the ipsec interface to be used.
+#
+# PLUTO_REQID
+# is the requid of the ESP policy
+#
+# PLUTO_ME
+# is the IP address of our host.
+#
+# PLUTO_MY_ID
+# is the ID of our host.
+#
+# PLUTO_MY_CLIENT
+# is the IP address / count of our client subnet. If
+# the client is just the host, this will be the
+# host's own IP address / max (where max is 32 for
+# IPv4 and 128 for IPv6).
+#
+# PLUTO_MY_CLIENT_NET
+# is the IP address of our client net. If the client
+# is just the host, this will be the host's own IP
+# address.
+#
+# PLUTO_MY_CLIENT_MASK
+# is the mask for our client net. If the client is
+# just the host, this will be 255.255.255.255.
+#
+# PLUTO_MY_SOURCEIP
+# if non-empty, then the source address for the route will be
+# set to this IP address.
+#
+# PLUTO_MY_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_MY_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on our side.
+#
+# PLUTO_PEER
+# is the IP address of our peer.
+#
+# PLUTO_PEER_ID
+# is the ID of our peer.
+#
+# PLUTO_PEER_CA
+# is the CA which issued the cert of our peer.
+#
+# PLUTO_PEER_CLIENT
+# is the IP address / count of the peer's client sub-
+# net. If the client is just the peer, this will be
+# the peer's own IP address / max (where max is 32
+# for IPv4 and 128 for IPv6).
+#
+# PLUTO_PEER_CLIENT_NET
+# is the IP address of the peer's client net. If the
+# client is just the peer, this will be the peer's
+# own IP address.
+#
+# PLUTO_PEER_CLIENT_MASK
+# is the mask for the peer's client net. If the
+# client is just the peer, this will be
+# 255.255.255.255.
+#
+# PLUTO_PEER_PROTOCOL
+# is the IP protocol that will be transported.
+#
+# PLUTO_PEER_PORT
+# is the UDP/TCP port to which the IPsec SA is
+# restricted on the peer side.
+#
+# PLUTO_XAUTH_ID
+# is an optional user ID employed by the XAUTH protocol
+#
+# PLUTO_MARK_IN
+# is an optional XFRM mark set on the inbound IPsec SA
+#
+# PLUTO_MARK_OUT
+# is an optional XFRM mark set on the outbound IPsec SA
+#
+# PLUTO_UDP_ENC
+# contains the remote UDP port in the case of ESP_IN_UDP
+# encapsulation
+#
+
+# define a minimum PATH environment in case it is not set
+PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/sbin"
+export PATH
+
+# uncomment to log VPN connections
+VPN_LOGGING=1
+#
+# tag put in front of each log entry:
+TAG=vpn
+#
+# syslog facility and priority used:
+FAC_PRIO=local0.notice
+#
+# to create a special vpn logging file, put the following line into
+# the syslog configuration file /etc/syslog.conf:
+#
+# local0.notice -/var/log/vpn
+
+# in order to use source IP routing the Linux kernel options
+# CONFIG_IP_ADVANCED_ROUTER and CONFIG_IP_MULTIPLE_TABLES
+# must be enabled
+#
+# special routing table for sourceip routes
+SOURCEIP_ROUTING_TABLE=220
+#
+# priority of the sourceip routing table
+SOURCEIP_ROUTING_TABLE_PRIO=220
+
+# check interface version
+case "$PLUTO_VERSION" in
+1.[0|1]) # Older Pluto?!? Play it safe, script may be using new features.
+ echo "$0: obsolete interface version \`$PLUTO_VERSION'," >&2
+ echo "$0: called by obsolete Pluto?" >&2
+ exit 2
+ ;;
+1.*) ;;
+*) echo "$0: unknown interface version \`$PLUTO_VERSION'" >&2
+ exit 2
+ ;;
+esac
+
+# check parameter(s)
+case "$1:$*" in
+':') # no parameters
+ ;;
+iptables:iptables) # due to (left/right)firewall; for default script only
+ ;;
+custom:*) # custom parameters (see above CAUTION comment)
+ ;;
+*) echo "$0: unknown parameters \`$*'" >&2
+ exit 2
+ ;;
+esac
+
+# utility functions for route manipulation
+# Meddling with this stuff should not be necessary and requires great care.
+uproute() {
+ doroute add
+ ip route flush cache
+}
+downroute() {
+ doroute delete
+ ip route flush cache
+}
+
+addsource() {
+ st=0
+ if ! ip -o route get ${PLUTO_MY_SOURCEIP%/*} | grep -q ^local
+ then
+ it="ip addr add ${PLUTO_MY_SOURCEIP%/*}/32 dev $PLUTO_INTERFACE"
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: addsource \`$it' failed ($oops)" >&2
+ fi
+ fi
+ return $st
+}
+
+doroute() {
+ st=0
+
+ if [ -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ for dir in /etc/sysconfig /etc/conf.d; do
+ if [ -f "$dir/defaultsource" ]
+ then
+ . "$dir/defaultsource"
+ fi
+ done
+
+ if [ -n "$DEFAULTSOURCE" ]
+ then
+ PLUTO_MY_SOURCEIP=$DEFAULTSOURCE
+ fi
+ fi
+
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # leave because no route entry is required
+ return $st
+ fi
+
+ parms1="$PLUTO_PEER_CLIENT"
+
+ if [ -n "$PLUTO_NEXT_HOP" ]
+ then
+ parms2="via $PLUTO_NEXT_HOP"
+ else
+ parms2="via $PLUTO_PEER"
+ fi
+ parms2="$parms2 dev $PLUTO_INTERFACE"
+
+ parms3=
+ if [ -n "$PLUTO_MY_SOURCEIP" ]
+ then
+ if test "$1" = "add"
+ then
+ addsource
+ if ! ip rule list | grep -q "lookup $SOURCEIP_ROUTING_TABLE"
+ then
+ ip rule add pref $SOURCEIP_ROUTING_TABLE_PRIO table $SOURCEIP_ROUTING_TABLE
+ fi
+ fi
+ parms3="$parms3 src ${PLUTO_MY_SOURCEIP%/*} table $SOURCEIP_ROUTING_TABLE"
+ fi
+
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # opportunistic encryption work around
+ # need to provide route that eclipses default, without
+ # replacing it.
+ it="ip route $1 0.0.0.0/1 $parms2 $parms3 &&
+ ip route $1 128.0.0.0/1 $parms2 $parms3"
+ ;;
+ *) it="ip route $1 $parms1 $parms2 $parms3"
+ ;;
+ esac
+ oops="`eval $it 2>&1`"
+ st=$?
+ if test " $oops" = " " -a " $st" != " 0"
+ then
+ oops="silent error, exit status $st"
+ fi
+ if test " $oops" != " " -o " $st" != " 0"
+ then
+ echo "$0: doroute \`$it' failed ($oops)" >&2
+ fi
+ return $st
+}
+
+# in the presence of KLIPS and ipsecN interfaces do not use IPSEC_POLICY
+if [ `echo "$PLUTO_INTERFACE" | grep "ipsec"` ]
+then
+ KLIPS=1
+ IPSEC_POLICY_IN=""
+ IPSEC_POLICY_OUT=""
+else
+ KLIPS=
+ IPSEC_POLICY="-m policy --pol ipsec --proto esp --reqid $PLUTO_REQID"
+ IPSEC_POLICY_IN="$IPSEC_POLICY --dir in"
+ IPSEC_POLICY_OUT="$IPSEC_POLICY --dir out"
+fi
+
+# is there an inbound mark to be set?
+if [ -n "$PLUTO_MARK_IN" ]
+then
+ if [ -n "$PLUTO_UDP_ENC" ]
+ then
+ SET_MARK="-p udp --sport $PLUTO_UDP_ENC"
+ else
+ SET_MARK="-p esp"
+ fi
+ SET_MARK="$SET_MARK -s $PLUTO_PEER -j MARK --set-mark $PLUTO_MARK_IN"
+fi
+
+# are there port numbers?
+if [ "$PLUTO_MY_PORT" != 0 ]
+then
+ S_MY_PORT="--sport $PLUTO_MY_PORT"
+ D_MY_PORT="--dport $PLUTO_MY_PORT"
+fi
+if [ "$PLUTO_PEER_PORT" != 0 ]
+then
+ S_PEER_PORT="--sport $PLUTO_PEER_PORT"
+ D_PEER_PORT="--dport $PLUTO_PEER_PORT"
+fi
+
+# resolve octal escape sequences
+PLUTO_MY_ID=`printf "$PLUTO_MY_ID"`
+PLUTO_PEER_ID=`printf "$PLUTO_PEER_ID"`
+
+# the big choice
+case "$PLUTO_VERB:$1" in
+prepare-host:*|prepare-client:*)
+ if [ -z "$KLIPS" -a -z "$PLUTO_MY_SOURCEIP" ]
+ then
+ # exit because no route will be added,
+ # so that existing routes can stay
+ exit 0
+ fi
+
+ # delete possibly-existing route (preliminary to adding a route)
+ case "$PLUTO_PEER_CLIENT_NET/$PLUTO_PEER_CLIENT_MASK" in
+ "0.0.0.0/0.0.0.0")
+ # need to provide route that eclipses default, without
+ # replacing it.
+ parms1="0.0.0.0/1"
+ parms2="128.0.0.0/1"
+ it="ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1"
+ oops="`ip route delete $parms1 2>&1 ; ip route delete $parms2 2>&1`"
+ ;;
+ *)
+ parms="$PLUTO_PEER_CLIENT"
+ it="ip route delete $parms 2>&1"
+ oops="`ip route delete $parms 2>&1`"
+ ;;
+ esac
+ status="$?"
+ if test " $oops" = " " -a " $status" != " 0"
+ then
+ oops="silent error, exit status $status"
+ fi
+ case "$oops" in
+ *'RTNETLINK answers: No such process'*)
+ # This is what route (currently -- not documented!) gives
+ # for "could not find such a route".
+ oops=
+ status=0
+ ;;
+ esac
+ if test " $oops" != " " -o " $status" != " 0"
+ then
+ echo "$0: \`$it' failed ($oops)" >&2
+ fi
+ exit $status
+ ;;
+route-host:*|route-client:*)
+ # connection to me or my client subnet being routed
+ uproute
+ ;;
+unroute-host:*|unroute-client:*)
+ # connection to me or my client subnet being unrouted
+ downroute
+ ;;
+up-host:)
+ # connection to me coming up
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -A PREROUTING $SET_MARK
+ fi
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+down-host:)
+ # connection to me going down
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -D PREROUTING $SET_MARK
+ fi
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_ME $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
+ #
+ # log IPsec host connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME"
+ fi
+ fi
+ ;;
+up-client:)
+ # connection to my client subnet coming up
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -A PREROUTING $SET_MARK
+ fi
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -I FORWARD 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -I FORWARD 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -I INPUT 1 -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT
+ iptables -I OUTPUT 1 -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection setup
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO \
+ "+ $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+down-client:)
+ # connection to my client subnet going down
+ # If you are doing a custom version, firewall commands go here.
+ if [ -n "$PLUTO_MARK_IN" ]
+ then
+ iptables -t mangle -D PREROUTING $SET_MARK
+ fi
+ if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/32" ]
+ then
+ iptables -D FORWARD -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ iptables -D FORWARD -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ fi
+ #
+ # a virtual IP requires an INPUT and OUTPUT rule on the host
+ # or sometimes host access via the internal IP is needed
+ if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ]
+ then
+ iptables -D INPUT -i $PLUTO_INTERFACE -p $PLUTO_MY_PROTOCOL \
+ -s $PLUTO_PEER_CLIENT $S_PEER_PORT \
+ -d $PLUTO_MY_CLIENT $D_MY_PORT \
+ $IPSEC_POLICY_IN -j ACCEPT
+ iptables -D OUTPUT -o $PLUTO_INTERFACE -p $PLUTO_PEER_PROTOCOL \
+ -s $PLUTO_MY_CLIENT $S_MY_PORT \
+ -d $PLUTO_PEER_CLIENT $D_PEER_PORT \
+ $IPSEC_POLICY_OUT -j ACCEPT
+ fi
+ #
+ # log IPsec client connection teardown
+ if [ $VPN_LOGGING ]
+ then
+ if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ]
+ then
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ else
+ logger -t $TAG -p $FAC_PRIO -- \
+ "- $PLUTO_PEER_ID $PLUTO_PEER_CLIENT == $PLUTO_PEER -- $PLUTO_ME == $PLUTO_MY_CLIENT"
+ fi
+ fi
+ ;;
+*) echo "$0: unknown verb \`$PLUTO_VERB' or parameter \`$1'" >&2
+ exit 1
+ ;;
+esac
--- /dev/null
+#!/sbin/runscript
+# Copyright 1999-2004 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+opts="start stop reload"
+
+depend() {
+ before net
+ need logger
+}
+
+start() {
+ ebegin "Starting firewall"
+
+ # default policy is DROP
+ /sbin/iptables -P INPUT DROP
+ /sbin/iptables -P OUTPUT DROP
+ /sbin/iptables -P FORWARD DROP
+
+ # allow ESP
+ iptables -A INPUT -i eth0 -p 50 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p 50 -j ACCEPT
+
+ # allow IKE
+ iptables -A INPUT -i eth0 -p udp --sport 500 --dport 500 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p udp --dport 500 --sport 500 -j ACCEPT
+
+ # allow MOBIKE
+ iptables -A INPUT -i eth0 -p udp --sport 4500 --dport 4500 -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p udp --dport 4500 --sport 4500 -j ACCEPT
+
+ # allow crl fetch from winnetou
+ iptables -A INPUT -i eth0 -p tcp --sport 80 -s PH_IP_WINNETOU -j ACCEPT
+ iptables -A OUTPUT -o eth0 -p tcp --dport 80 -d PH_IP_WINNETOU -j ACCEPT
+
+ # allow ssh
+ iptables -A INPUT -p tcp --dport 22 -j ACCEPT
+ iptables -A OUTPUT -p tcp --sport 22 -j ACCEPT
+
+ eend $?
+}
+
+stop() {
+ ebegin "Stopping firewall"
+ for a in `cat /proc/net/ip_tables_names`; do
+ /sbin/iptables -F -t $a
+ /sbin/iptables -X -t $a
+
+ if [ $a == nat ]; then
+ /sbin/iptables -t nat -P PREROUTING ACCEPT
+ /sbin/iptables -t nat -P POSTROUTING ACCEPT
+ /sbin/iptables -t nat -P OUTPUT ACCEPT
+ elif [ $a == mangle ]; then
+ /sbin/iptables -t mangle -P PREROUTING ACCEPT
+ /sbin/iptables -t mangle -P INPUT ACCEPT
+ /sbin/iptables -t mangle -P FORWARD ACCEPT
+ /sbin/iptables -t mangle -P OUTPUT ACCEPT
+ /sbin/iptables -t mangle -P POSTROUTING ACCEPT
+ elif [ $a == filter ]; then
+ /sbin/iptables -t filter -P INPUT ACCEPT
+ /sbin/iptables -t filter -P FORWARD ACCEPT
+ /sbin/iptables -t filter -P OUTPUT ACCEPT
+ fi
+ done
+ eend $?
+}
+
+reload() {
+ ebegin "Flushing firewall"
+ for a in `cat /proc/net/ip_tables_names`; do
+ /sbin/iptables -F -t $a
+ /sbin/iptables -X -t $a
+ done;
+ eend $?
+ start
+}
+
--- /dev/null
+# /etc/ipsec.conf - strongSwan IPsec configuration file
+
+config setup
+ plutodebug=control
+ crlcheckinterval=180
+ strictcrlpolicy=no
+ charonstart=no
+
+conn %default
+ ikelifetime=60m
+ keylife=20m
+ rekeymargin=3m
+ keyingtries=1
+
+conn home
+ left=%defaultroute
+ leftsubnet=10.1.0.0/25
+ leftcert=venusCert.pem
+ leftid=@venus.strongswan.org
+ leftfirewall=yes
+ lefthostaccess=yes
+ right=PH_IP_SUN
+ rightid=@sun.strongswan.org
+ rightsubnet=10.2.0.0/16
+ auto=add
--- /dev/null
+sun::iptables -t mangle -v -n -L PREROUTING
+sun::ipsec stop
+alice::ipsec stop
+venus::ipsec stop
+alice::/etc/init.d/iptables stop 2> /dev/null
+venus::/etc/init.d/iptables stop 2> /dev/null
+sun::/etc/init.d/iptables stop 2> /dev/null
+sun::ip route del 10.1.0.0/16 via PH_IP_MOON
+sun::conntrack -F
+sun::rm /etc/mark_updown
+moon::iptables -t nat -F
+moon::conntrack -F
--- /dev/null
+alice::/etc/init.d/iptables start 2> /dev/null
+venus::/etc/init.d/iptables start 2> /dev/null
+sun::/etc/init.d/iptables start 2> /dev/null
+moon::echo 1 > /proc/sys/net/ipv4/ip_forward
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p tcp -j SNAT --to PH_IP_MOON
+sun::ip route add 10.1.0.0/16 via PH_IP_MOON
+sun::iptables -t nat -A POSTROUTING -o eth1 -m mark --mark 10 -j SNAT --to 10.3.0.10
+sun::iptables -t nat -A POSTROUTING -o eth1 -m mark --mark 20 -j SNAT --to 10.3.0.20
+sun::iptables -t mangle -A PREROUTING -d 10.3.0.10 -j MARK --set-mark 11
+sun::iptables -t mangle -A PREROUTING -d 10.3.0.20 -j MARK --set-mark 21
+alice::ipsec start
+venus::ipsec start
+sun::ipsec start
+alice::sleep 2
+alice::ipsec up home
+venus::sleep 2
+venus::ipsec up home
+venus::sleep 2
--- /dev/null
+#!/bin/bash
+#
+# This configuration file provides information on the
+# UML instances used for this test
+
+# All UML instances that are required for this test
+#
+UMLHOSTS="alice venus moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-v-m-w-s-b.png"
+
+# UML instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon bob"
+
+# UML instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="alice venus sun"
projects / thirdparty / strongswan.git / commitdiff
