--- /dev/null
+A connection between the subnets behind the gateways <b>moon</b> and <b>sun</b>
+is set up using VTI interfaces.
+<p/>
+The gateways use <b>route-based forwarding</b> with <b>VTI tunnels</b>, with
+firewall rules to allow traffic to pass. The IPsec traffic selector used is
+0.0.0.0/0, however specific routing is achieved with routes on the VTI
+interfaces. The IKE daemon is configured to not install routes with
+<em>charon.install_routes=0</em>, and static routes are installed for the
+target subnets on the VTI interfaces.
+<p/>
+Client <b>alice</b> behind gateway <b>moon</b> pings client <b>bob</b> located
+behind gateway <b>sun</b>.
--- /dev/null
+moon::swanctl --list-sas --ike-id 1 --raw 2> /dev/null::gw.*version=2 state=ESTABLISHED local-host=PH_IP_MOON local-port=4500 local-id=moon.strongswan.org remote-host=PH_IP_SUN remote-port=4500 remote-id=sun.strongswan.org.*child-sas.*net.*reqid=1 state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[0.0.0.0/0] remote-ts=\[0.0.0.0/0]::YES
+sun::swanctl --list-sas --ike-id 1 --raw 2> /dev/null::gw.*version=2 state=ESTABLISHED local-host=PH_IP_SUN local-port=4500 local-id=sun.strongswan.org remote-host=PH_IP_MOON remote-port=4500 remote-id=moon.strongswan.org.*child-sas.*net.*reqid=1 state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[0.0.0.0/0] remote-ts=\[0.0.0.0/0]::YES
+alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
+sun::tcpdump::IP moon.strongswan.org > sun.strongswan.org: ESP::YES
+sun::tcpdump::IP sun.strongswan.org > moon.strongswan.org: ESP::YES
--- /dev/null
+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+ load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+ load = random nonce aes sha1 sha2 pem pkcs1 curve25519 gmp x509 curl revocation hmac vici kernel-netlink socket-default updown
+}
+
+charon {
+ install_routes = 0
+}
--- /dev/null
+connections {
+
+ gw-gw {
+ local_addrs = PH_IP_MOON
+ remote_addrs = PH_IP_SUN
+
+ local {
+ auth = pubkey
+ certs = moonCert.pem
+ id = moon.strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = sun.strongswan.org
+ }
+ children {
+ net-net {
+ local_ts = 0.0.0.0/0
+ remote_ts = 0.0.0.0/0
+ mark_in = 42
+ mark_out = 42
+
+ esp_proposals = aes128gcm128-x25519
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-x25519
+ }
+}
--- /dev/null
+# /etc/strongswan.conf - strongSwan configuration file
+
+swanctl {
+ load = pem pkcs1 x509 revocation constraints pubkey openssl random
+}
+
+charon-systemd {
+ load = random nonce aes sha1 sha2 pem pkcs1 curve25519 gmp x509 curl revocation hmac vici kernel-netlink socket-default updown
+}
+
+charon {
+ install_routes = 0
+}
--- /dev/null
+connections {
+
+ gw-gw {
+ local_addrs = PH_IP_SUN
+ remote_addrs = PH_IP_MOON
+
+ local {
+ auth = pubkey
+ certs = sunCert.pem
+ id = sun.strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = moon.strongswan.org
+ }
+ children {
+ net-net {
+ local_ts = 0.0.0.0/0
+ remote_ts = 0.0.0.0/0
+ mark_in = 1337
+ mark_out = 1337
+
+ esp_proposals = aes128gcm128-x25519
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-x25519
+ }
+}
--- /dev/null
+moon::swanctl --terminate --ike gw-gw
+moon::systemctl stop strongswan-swanctl
+sun::systemctl stop strongswan-swanctl
+moon::iptables-restore < /etc/iptables.flush
+sun::iptables-restore < /etc/iptables.flush
+moon::ip tunnel del vti-moon
+sun::ip tunnel del vti-sun
--- /dev/null
+moon::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+moon::ip tunnel add vti-moon local PH_IP_MOON remote PH_IP_SUN mode vti key 42
+moon::sysctl -w net.ipv4.conf.vti-moon.disable_policy=1
+moon::ip link set vti-moon up
+moon::ip route add 10.2.0.0/16 dev vti-moon
+moon::iptables -A FORWARD -i vti-moon -j ACCEPT
+moon::iptables -A FORWARD -o vti-moon -j ACCEPT
+sun::ip tunnel add vti-sun local PH_IP_SUN remote PH_IP_MOON mode vti key 1337
+sun::sysctl -w net.ipv4.conf.vti-sun.disable_policy=1
+sun::ip link set vti-sun up
+sun::ip route add 10.1.0.0/16 dev vti-sun
+sun::iptables -A FORWARD -i vti-sun -j ACCEPT
+sun::iptables -A FORWARD -o vti-sun -j ACCEPT
+moon::systemctl start strongswan-swanctl
+sun::systemctl start strongswan-swanctl
+moon::expect-connection gw-gw
+sun::expect-connection gw-gw
+moon::swanctl --initiate --child net-net
--- /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 moon winnetou sun bob"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-w-s-b.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="sun"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon sun"
+
+# charon controlled by swanctl
+#
+SWANCTL=1