--- /dev/null
+This scenario demonstrates a property of <b>XFRM interfaces</b> that allows
+moving them into network namespaces while retaining access to IPsec SAs and
+policies in the original namespace. This enables an IKE daemon in one namespace
+to provide IPsec tunnels for processes in other namespaces without having to
+give them access to the keys and IKE credentials.
+<p/>
+The gateways use <b>route-based forwarding</b> with <b>XFRM interfaces</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 XFRM
+interfaces. The IKE daemon does not install routes for CHILD_SAs with outbound
+interface ID, so static routes are installed for the target subnets.
+<p/>
+The XFRM interface on gateway <b>moon</b> is moved into a new network namespace
+from which a ping is sent to client <b>bob</b>. It is then moved back out and
+<b>alice</b> sends another ping to <b>bob</b> to test if that works too.
+<p/>
+Gateway <b>sun</b> dynamically creates the XFRM interface via updown script
+using the passed unique generated interface ID.
+<p/>
+Note that the dropped packet seen on the <b>XFRM interface</b> on <b>moon</b>
+is an IPv6 Router Solicitation (NDP) sent from that namespace, which doesn't
+match the IPsec policy.
--- /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
+moon::ip netns add xfrmi-test::.*::NO
+moon::ip link set xfrm-moon netns xfrmi-test::.*::NO
+moon::ip netns exec xfrmi-test ip addr add 10.1.0.42/32 dev xfrm-moon::.*::NO
+moon::ip netns exec xfrmi-test ip link set dev xfrm-moon up::.*::NO
+moon::ip netns exec xfrmi-test ip route add 10.2.0.0/16 dev xfrm-moon src 10.1.0.42::.*::NO
+moon::ip netns exec xfrmi-test ip xfrm state::.*::NO
+moon::ip netns exec xfrmi-test ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
+alice::ping -c 1 -W 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::NO
+moon::ip netns exec xfrmi-test ip link set xfrm-moon netns 1::.*::NO
+moon::ip netns del xfrmi-test::.*::NO
+moon::ip link set dev xfrm-moon up::.*::NO
+moon::ip route add 10.2.0.0/16 dev xfrm-moon::.*::NO
+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
+}
--- /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
+
+ if_id_out = 42
+ if_id_in = 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
+}
--- /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
+
+ if_id_out = %unique
+ if_id_in = %unique
+
+ updown = /etc/updown
+
+ esp_proposals = aes128gcm128-x25519
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-x25519
+ }
+}
--- /dev/null
+#!/bin/bash
+
+IF_NAME="xfrmi-${PLUTO_IF_ID_IN}"
+
+case "${PLUTO_VERB}" in
+ up-client)
+ /usr/local/libexec/ipsec/xfrmi -n "${IF_NAME}" -i "${PLUTO_IF_ID_IN}" -d eth0
+ ip link set "${IF_NAME}" up
+ ip route add 10.1.0.0/16 dev "${IF_NAME}"
+ iptables -A FORWARD -i "${IF_NAME}" -j ACCEPT
+ iptables -A FORWARD -o "${IF_NAME}" -j ACCEPT
+ ;;
+ down-client)
+ iptables -D FORWARD -i "${IF_NAME}" -j ACCEPT
+ iptables -D FORWARD -o "${IF_NAME}" -j ACCEPT
+ ip link del "${IF_NAME}"
+ ;;
+esac
--- /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 -s link show xfrm-moon
+moon::ip link del xfrm-moon
+sun::rm /etc/updown
--- /dev/null
+moon::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+moon::/usr/local/libexec/ipsec/xfrmi -n xfrm-moon -i 42 -d eth0
+moon::ip link set xfrm-moon up
+moon::ip route add 10.2.0.0/16 dev xfrm-moon
+moon::iptables -A FORWARD -i xfrm-moon -j ACCEPT
+moon::iptables -A FORWARD -o xfrm-moon -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
--- /dev/null
+A connection between the subnets behind the gateways <b>moon</b> and <b>sun</b>
+is set up using XFRM interfaces.
+<p/>
+The gateways use <b>route-based forwarding</b> with <b>XFRM interfaces</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 XFRM
+interfaces. The IKE daemon does not install routes for CHILD_SAs with outbound
+interface ID, so static routes are installed for the target subnets.
+<p/>
+Both gateways use separate interfaces for in- and outbound traffic (which is
+completely optional and mainly for testing purposes, a single interface will
+usually be enough). Gateway <b>moon</b> creates them before initiating the
+connection, while gateway <b>sun</b> dynamically creates the interfaces via
+updown script using the passed unique generated interface IDs.
+<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
+}
--- /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
+
+ if_id_out = 1337
+ if_id_in = 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
+}
--- /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
+
+ if_id_in = %unique-dir
+ if_id_out = %unique-dir
+
+ updown = /etc/updown
+
+ esp_proposals = aes128gcm128-x25519
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-x25519
+ }
+}
--- /dev/null
+#!/bin/bash
+
+IF_NAME="xfrm-"
+IF_NAME_IN="${IF_NAME}${PLUTO_IF_ID_IN}-in"
+IF_NAME_OUT="${IF_NAME}${PLUTO_IF_ID_OUT}-out"
+
+case "${PLUTO_VERB}" in
+ up-client)
+ /usr/local/libexec/ipsec/xfrmi -n "${IF_NAME_OUT}" -i "${PLUTO_IF_ID_OUT}" -d eth0
+ /usr/local/libexec/ipsec/xfrmi -n "${IF_NAME_IN}" -i "${PLUTO_IF_ID_IN}" -d eth0
+ ip link set "${IF_NAME_OUT}" up
+ ip link set "${IF_NAME_IN}" up
+ ip route add 10.1.0.0/16 dev "${IF_NAME_OUT}"
+ iptables -A FORWARD -o "${IF_NAME_OUT}" -j ACCEPT
+ iptables -A FORWARD -i "${IF_NAME_IN}" -j ACCEPT
+ ;;
+ down-client)
+ iptables -D FORWARD -o "${IF_NAME_OUT}" -j ACCEPT
+ iptables -D FORWARD -i "${IF_NAME_IN}" -j ACCEPT
+ ip link del "${IF_NAME_OUT}"
+ ip link del "${IF_NAME_IN}"
+ ;;
+esac
--- /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 -s link show xfrm-moon-out
+moon::ip -s link show xfrm-moon-in
+moon::ip link del xfrm-moon-out
+moon::ip link del xfrm-moon-in
+sun::rm /etc/updown
--- /dev/null
+moon::iptables-restore < /etc/iptables.rules
+sun::iptables-restore < /etc/iptables.rules
+moon::/usr/local/libexec/ipsec/xfrmi -n xfrm-moon-out -d eth0 -i 1337
+moon::/usr/local/libexec/ipsec/xfrmi -n xfrm-moon-in -d eth0 -i 42
+moon::ip link set xfrm-moon-out up
+moon::ip link set xfrm-moon-in up
+moon::ip route add 10.2.0.0/16 dev xfrm-moon-out
+moon::iptables -A FORWARD -o xfrm-moon-out -j ACCEPT
+moon::iptables -A FORWARD -i xfrm-moon-in -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
--- /dev/null
+The roadwarriors <b>carol</b> and <b>dave</b> set up a connection each to
+gateway <b>moon</b>. Both <b>carol</b> and <b>dave</b> request a <b>virtual
+IP</b> via IKEv2 configuration payload.
+<p/>
+The gateway <b>moon</b> uses <b>route-based forwarding</b> with an <b>XFRM
+interface</b>, with firewall rules to allow traffic to pass. The IKE daemon
+does not install routes for CHILD_SAs with outbound interface ID, so a static
+route is installed for the virtual IP subnet via XFRM interface.
+<p/>
+Both <b>carol</b> and <b>dave</b> ping the client <b>alice</b> behind the
+gateway <b>moon</b>. The source IP addresses of the two pings will be the
+virtual IPs <b>carol1</b> and <b>dave1</b>, respectively.
--- /dev/null
+carol::swanctl --list-sas --raw 2> /dev/null::home.*version=2 state=ESTABLISHED local-host=PH_IP_CAROL local-port=4500 local-id=carol@strongswan.org remote-host=PH_IP_MOON remote-port=4500 remote-id=moon.strongswan.org initiator=yes.*child-sas.*home.*state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[10.3.0.1/32] remote-ts=\[10.1.0.0/16]::YES
+dave:: swanctl --list-sas --raw 2> /dev/null::home.*version=2 state=ESTABLISHED local-host=PH_IP_DAVE local-port=4500 local-id=dave@strongswan.org remote-host=PH_IP_MOON remote-port=4500 remote-id=moon.strongswan.org initiator=yes.*child-sas.*home.*state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[10.3.0.2/32] remote-ts=\[10.1.0.0/16]::YES
+moon:: swanctl --list-sas --ike-id 1 --raw 2> /dev/null::rw.*version=2 state=ESTABLISHED local-host=PH_IP_MOON local-port=4500 local-id=moon.strongswan.org remote-host=PH_IP_CAROL remote-port=4500 remote-id=carol@strongswan.org.*child-sas.*net.*reqid=1 state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[10.1.0.0/16] remote-ts=\[10.3.0.1/32]::YES
+moon:: swanctl --list-sas --ike-id 2 --raw 2> /dev/null::rw.*version=2 state=ESTABLISHED local-host=PH_IP_MOON local-port=4500 local-id=moon.strongswan.org remote-host=PH_IP_DAVE remote-port=4500 remote-id=dave@strongswan.org.*child-sas.*net.*reqid=2 state=INSTALLED mode=TUNNEL.*ESP.*local-ts=\[10.1.0.0/16] remote-ts=\[10.3.0.2/32]::YES
+carol::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_.eq=1::YES
+dave::ping -c 1 PH_IP_ALICE::64 bytes from PH_IP_ALICE: icmp_.eq=1::YES
+moon::tcpdump::IP moon.strongswan.org > carol.strongswan.org: ESP::YES
+moon::tcpdump::IP carol.strongswan.org > moon.strongswan.org: ESP::YES
+moon::tcpdump::IP moon.strongswan.org > dave.strongswan.org: ESP::YES
+moon::tcpdump::IP dave.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 hmac pem pkcs1 x509 revocation curve25519 gmp curl kernel-netlink socket-default updown vici
+}
--- /dev/null
+connections {
+
+ home {
+ local_addrs = PH_IP_CAROL
+ remote_addrs = PH_IP_MOON
+ vips = 0.0.0.0
+
+ local {
+ auth = pubkey
+ certs = carolCert.pem
+ id = carol@strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = moon.strongswan.org
+ }
+ children {
+ home {
+ remote_ts = 10.1.0.0/16
+
+ updown = /usr/local/libexec/ipsec/_updown iptables
+ 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 hmac pem pkcs1 x509 revocation curve25519 gmp curl kernel-netlink socket-default updown vici
+}
--- /dev/null
+connections {
+
+ home {
+ local_addrs = PH_IP_DAVE
+ remote_addrs = PH_IP_MOON
+ vips = 0.0.0.0
+
+ local {
+ auth = pubkey
+ certs = daveCert.pem
+ id = dave@strongswan.org
+ }
+ remote {
+ auth = pubkey
+ id = moon.strongswan.org
+ }
+ children {
+ home {
+ remote_ts = 10.1.0.0/16
+
+ updown = /usr/local/libexec/ipsec/_updown iptables
+ 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
+}
--- /dev/null
+connections {
+
+ rw {
+ local_addrs = PH_IP_MOON
+ pools = rw_pool
+
+ local {
+ auth = pubkey
+ certs = moonCert.pem
+ id = moon.strongswan.org
+ }
+ remote {
+ auth = pubkey
+ }
+ children {
+ net {
+ local_ts = 10.1.0.0/16
+
+ if_id_out = 42
+ if_id_in = 42
+
+ esp_proposals = aes128gcm128-x25519
+ }
+ }
+ version = 2
+ proposals = aes128-sha256-x25519
+ }
+}
+
+pools {
+ rw_pool {
+ addrs = 10.3.0.0/28
+ }
+}
--- /dev/null
+carol::swanctl --terminate --ike home
+dave::swanctl --terminate --ike home
+moon::systemctl stop strongswan-swanctl
+carol::systemctl stop strongswan-swanctl
+dave::systemctl stop strongswan-swanctl
+moon::iptables-restore < /etc/iptables.flush
+carol::iptables-restore < /etc/iptables.flush
+dave::iptables-restore < /etc/iptables.flush
+moon::ip -s link show xfrm-moon
+moon::ip link del xfrm-moon
--- /dev/null
+moon::iptables-restore < /etc/iptables.rules
+carol::iptables-restore < /etc/iptables.rules
+dave::iptables-restore < /etc/iptables.rules
+moon::/usr/local/libexec/ipsec/xfrmi -n xfrm-moon -i 42 -d eth0
+moon::ip link set xfrm-moon up
+moon::ip route add 10.3.0.0/28 dev xfrm-moon
+moon::iptables -A FORWARD -i xfrm-moon -j ACCEPT
+moon::iptables -A FORWARD -o xfrm-moon -j ACCEPT
+moon::systemctl start strongswan-swanctl
+carol::systemctl start strongswan-swanctl
+dave::systemctl start strongswan-swanctl
+moon::expect-connection rw
+carol::expect-connection home
+carol::swanctl --initiate --child home
+dave::expect-connection home
+dave::swanctl --initiate --child home
--- /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 carol winnetou dave"
+
+# Corresponding block diagram
+#
+DIAGRAM="a-m-c-w-d.png"
+
+# Guest instances on which tcpdump is to be started
+#
+TCPDUMPHOSTS="moon"
+
+# Guest instances on which IPsec is started
+# Used for IPsec logging purposes
+#
+IPSECHOSTS="moon carol dave"
+
+# charon controlled by swanctl
+#
+SWANCTL=1
projects / thirdparty / strongswan.git / commitdiff
