added

testing/tests/ikev1/nat-before-esp/description.txt

@@ -0,0 +1,6 @@
+An IPsec tunnel connecting the gateway <b>moon</b> with the subnet behind
+gateway <b>sun</b> is set up. This host-to-net connection can also be
+used by the clients <b>alice</b> and <b>venus</b> via the trick of NAT-ing
+them to the outer IP address of gateway <b>moon</b> prior to tunnelling.
+The IPsec tunnel is first tested by <b>moon</b> pinging <b>bob</b> and vice versa,
+followed by the NAT-ed clients <b>alice</b> and <b>venus</b> pinging <b>bob</b>.

testing/tests/ikev1/nat-before-esp/evaltest.dat

@@ -0,0 +1,9 @@
+moon::ipsec status::host-net.*STATE_QUICK_I2.*IPsec SA established::YES
+sun::ipsec status::host-net.*STATE_QUICK_R2.*IPsec SA established::YES
+moon::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_seq=1::YES
+bob::ping -c 1 PH_IP_MOON::64 bytes from PH_IP_MOON: icmp_seq=1::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
+sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::YES
+sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::YES
+bob::tcpdump::icmp::YES

testing/tests/ikev1/nat-before-esp/hosts/moon/etc/init.d/iptables

@@ -0,0 +1,83 @@
+#!/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"
+
+	# enable IP forwarding
+	echo 1 > /proc/sys/net/ipv4/ip_forward
+	
+	# default policy is DROP
+	/sbin/iptables -P INPUT DROP
+	/sbin/iptables -P OUTPUT DROP
+	/sbin/iptables -P FORWARD DROP
+
+	# NAT traffic from 10.1.0.0/16
+	iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -j MASQUERADE
+	
+	# forward traffic from 10.1.0.0/16 to POSTROUTING chain
+	iptables -A FORWARD -i eth1 -o eth0 -s 10.1.0.0/16 -d 10.2.0.0/16 -j ACCEPT
+	iptables -A FORWARD -o eth1 -i eth0 -d 10.1.0.0/16 -s 10.2.0.0/16 -j ACCEPT
+
+	# 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 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
+}
+

testing/tests/ikev1/nat-before-esp/hosts/moon/etc/ipsec.conf

@@ -0,0 +1,24 @@
+# /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 host-net
+	left=192.168.0.1
+	leftnexthop=%direct
+	leftcert=moonCert.pem
+	[email protected]
+	leftfirewall=yes
+	right=192.168.0.2
+	rightsubnet=10.2.0.0/16
+	[email protected]
+	auto=add

testing/tests/ikev1/nat-before-esp/hosts/sun/etc/ipsec.conf

@@ -0,0 +1,23 @@
+# /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 host-net
+	left=192.168.0.2
+	leftcert=sunCert.pem
+	[email protected]
+	leftfirewall=yes
+	leftsubnet=10.2.0.0/16
+	right=%any
+	auto=add

testing/tests/ikev1/nat-before-esp/posttest.dat

@@ -0,0 +1,6 @@
+moon::iptables -v -n -L
+moon::iptables -t nat -v -n -L
+moon::ipsec stop
+sun::ipsec stop
+moon::/etc/init.d/iptables stop 2> /dev/null
+sun::/etc/init.d/iptables stop 2> /dev/null

testing/tests/ikev1/nat-before-esp/pretest.dat

@@ -0,0 +1,6 @@
+moon::/etc/init.d/iptables start 2> /dev/null
+sun::/etc/init.d/iptables start 2> /dev/null
+moon::ipsec start
+sun::ipsec start
+moon::sleep 2
+moon::ipsec up host-net

testing/tests/ikev1/nat-before-esp/test.conf

@@ -0,0 +1,21 @@
+#!/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-m-w-s-b.png"
+ 
+# UML instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="sun bob"
+
+# UML instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon sun"