--- /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>. They tunnel all traffic to the gateway. In order to prevent
+local traffic within the <b>10.1.0.0/16</b> subnet to enter the tunnel, both set up a <b>local-net</b>
+shunt policy with <b>mode = pass</b>.
+<p/>
+In order to test the tunnel, the NAT-ed hosts <b>alice</b> and <b>venus</b>
+ping each other and the client <b>bob</b> behind the gateway <b>sun</b>.
--- /dev/null
+alice::swanctl --list-pols --raw 2> /dev/null::local-net.*mode=PASS local-ts=\[10.1.0.0/16] remote-ts=\[10.1.0.0/16::YES
+venus::swanctl --list-pols --raw 2> /dev/null::local-net.*mode=PASS local-ts=\[10.1.0.0/16] remote-ts=\[10.1.0.0/16::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_req=1::YES
+alice::ping -c 1 PH_IP_VENUS::64 bytes from PH_IP_VENUS: icmp_req=1::YES
+venus::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_req=1::YES
+venus::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_req=1::YES
+alice::swanctl --list-sas --raw 2> /dev/null::nat-t.*version=2 state=ESTABLISHED local-host=10.1.0.10 local-id=alice@strongswan.org remote-host=192.168.0.2 remote-id=sun.strongswan.org initiator=yes.*nat-local=yes nat-any=yes encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=MODP_3072.*local-vips=\[10.3.0.1] child-sas.*nat-t.*state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.3.0.1/32] remote-ts=\[0.0.0.0/0]::YES
+venus::swanctl --list-sas --raw 2> /dev/null::nat-t.*version=2 state=ESTABLISHED local-host=10.1.0.20 local-id=venus.strongswan.org remote-host=192.168.0.2 remote-id=sun.strongswan.org initiator=yes.*nat-local=yes nat-any=yes encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=MODP_3072.*local-vips=\[10.3.0.2] child-sas.*nat-t.*state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.3.0.2/32] remote-ts=\[0.0.0.0/0]::YES
+sun::swanctl --list-sas --ike-id 1 --raw 2> /dev/null::nat-t.*version=2 state=ESTABLISHED local-host=192.168.0.2 local-id=sun.strongswan.org remote-host=192.168.0.1 remote-id=alice@strongswan.org.*nat-remote=yes nat-any=yes encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=MODP_3072.*remote-vips=\[10.3.0.1] child-sas.*nat-t.*state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[0.0.0.0/0] remote-ts=\[10.3.0.1/32]::YES
+sun::swanctl --list-sas --ike-id 2 --raw 2> /dev/null::nat-t.*version=2 state=ESTABLISHED local-host=192.168.0.2 local-id=sun.strongswan.org remote-host=192.168.0.1 remote-id=venus.strongswan.org.*nat-remote=yes nat-any=yes encr-alg=AES_CBC encr-keysize=128 integ-alg=HMAC_SHA2_256_128 prf-alg=PRF_HMAC_SHA2_256 dh-group=MODP_3072.*remote-vips=\[10.3.0.2] child-sas.*nat-t.*state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[0.0.0.0/0] remote-ts=\[10.3.0.2/32]::YES
+moon::tcpdump::IP moon.strongswan.org.* > sun.strongswan.org.4500: UDP-encap: ESP::YES
+moon::tcpdump::IP sun.strongswan.org.4500 > moon.strongswan.org.*: UDP-encap: ESP::YES
+alice::tcpdump::IP alice.strongswan.org > venus.strongswan.org: ICMP::YES
+alice::tcpdump::IP venus.strongswan.org > alice.strongswan.org: ICMP::YES
--- /dev/null
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+ load = random nonce aes sha1 sha2 pem pkcs1 gmp x509 curl revocation hmac vici kernel-netlink socket-default updown
+
+ start-scripts {
+ creds = /usr/local/sbin/swanctl --load-creds
+ conns = /usr/local/sbin/swanctl --load-conns
+ }
+ keep_alive = 5
+}
--- /dev/null
+connections {
+
+ nat-t {
+ remote_addrs = 192.168.0.2
+ vips = 0.0.0.0
+
+ local {
+ auth = pubkey
+ certs = aliceCert.pem
+ id = alice@strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = sun.strongswan.org
+ }
+ children {
+ nat-t {
+ remote_ts = 0.0.0.0/0
+
+ updown = /usr/local/libexec/ipsec/_updown iptables
+ esp_proposals = aes128gcm128-modp3072
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-modp3072
+ }
+
+ local-net {
+
+ children {
+ local-net {
+ local_ts = 10.1.0.0/16
+ remote_ts = 10.1.0.0/16
+
+ mode = pass
+ start_action = trap
+ }
+ }
+ }
+}
--- /dev/null
+*filter
+
+# default policy is DROP
+-P INPUT DROP
+-P OUTPUT DROP
+-P FORWARD DROP
+
+# allow IKE
+-A INPUT -i eth0 -p udp --dport 500 -j ACCEPT
+-A OUTPUT -o eth0 -p udp --sport 500 -j ACCEPT
+
+# allow MobIKE
+-A INPUT -i eth0 -p udp --dport 4500 -j ACCEPT
+-A OUTPUT -o eth0 -p udp --sport 4500 -j ACCEPT
+
+# allow ssh
+-A INPUT -p tcp --dport 22 -j ACCEPT
+-A OUTPUT -p tcp --sport 22 -j ACCEPT
+
+# allow crl fetch from winnetou
+-A INPUT -i eth0 -p tcp --sport 80 -s PH_IP_WINNETOU -j ACCEPT
+-A OUTPUT -o eth0 -p tcp --dport 80 -d PH_IP_WINNETOU -j ACCEPT
+
+COMMIT
--- /dev/null
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+ load = random nonce aes sha1 sha2 pem pkcs1 gmp x509 curl revocation hmac vici kernel-netlink socket-default updown
+
+ start-scripts {
+ creds = /usr/local/sbin/swanctl --load-creds
+ pools = /usr/local/sbin/swanctl --load-pools
+ conns = /usr/local/sbin/swanctl --load-conns
+ }
+}
--- /dev/null
+connections {
+
+ nat-t {
+ local_addrs = 192.168.0.2
+ pools = rw_pool
+
+ local {
+ auth = pubkey
+ certs = sunCert.pem
+ id = sun.strongswan.org
+ }
+ remote {
+ auth = pubkey
+ }
+ children {
+ nat-t {
+ local_ts = 0.0.0.0/0
+
+ updown = /usr/local/libexec/ipsec/_updown iptables
+ esp_proposals = aes128gcm128-modp3072
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-modp3072
+ }
+}
+
+pools {
+ rw_pool {
+ addrs = 10.3.0.0/28
+ }
+}
--- /dev/null
+# /etc/strongswan.conf - strongSwan configuration file
+
+charon {
+ load = random nonce aes sha1 sha2 pem pkcs1 gmp x509 curl revocation hmac vici kernel-netlink socket-default updown
+
+ start-scripts {
+ creds = /usr/local/sbin/swanctl --load-creds
+ conns = /usr/local/sbin/swanctl --load-conns
+ }
+ keep_alive = 5
+}
--- /dev/null
+connections {
+
+ nat-t {
+ remote_addrs = 192.168.0.2
+ vips = 0.0.0.0
+
+ local {
+ auth = pubkey
+ certs = venusCert.pem
+ id = venus.strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = sun.strongswan.org
+ }
+ children {
+ nat-t {
+ remote_ts = 0.0.0.0/0
+
+ updown = /usr/local/libexec/ipsec/_updown iptables
+ esp_proposals = aes128gcm128-modp3072
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-modp3072
+ }
+
+ local-net {
+
+ children {
+ local-net {
+ local_ts = 10.1.0.0/16
+ remote_ts = 10.1.0.0/16
+
+ mode = pass
+ start_action = trap
+ }
+ }
+ }
+}
--- /dev/null
+alice::service charon stop 2> /dev/null
+venus::service charon stop 2> /dev/null
+sun::service charon stop 2> /dev/null
+sun::iptables-restore < /etc/iptables.flush
+moon::iptables -t nat -F
--- /dev/null
+sun::iptables-restore < /etc/iptables.rules
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p udp -j SNAT --to-source PH_IP_MOON:1024-1100
+moon::iptables -t nat -A POSTROUTING -o eth0 -s 10.1.0.0/16 -p tcp -j SNAT --to-source PH_IP_MOON:2000-2100
+sun::service charon start 2> /dev/null
+alice::service charon start 2> /dev/null
+venus::service charon start 2> /dev/null
+sun::expect-connection nat-t
+alice::expect-connection nat-t
+venus::expect-connection nat-t
+alice::swanctl --initiate --child nat-t 2> /dev/null
+venus::swanctl --initiate --child nat-t 2> /dev/null
--- /dev/null
+#!/bin/bash
+#
+# This configuration file provides information on the
+# guest instances used for this test
+
+# All guest instances that are required for this test
+#
+VIRTHOSTS="alice venus moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-v-m-w-s-b.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="alice moon"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="alice venus sun"
+
+# charon controlled by swanctl
+#
+SWANCTL=1