testing: Add libipsec/net2net-trap scenario
This commit is contained in:
Tobias Brunner
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A tunnel that will connect the subnets behind the gateways <b>moon</b>
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and <b>sun</b>, respectively, is preconfigured by installing a trap policy
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on gateway <b>moon</b> by means of the setting <b>start_action = trap</b> in swanctl.conf.
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A subsequent ping issued by client <b>alice</b> behind gateway <b>moon</b> to
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<b>bob</b> located behind gateway <b>sun</b> triggers an acquire and
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leads to the automatic establishment of the subnet-to-subnet tunnel.
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<p/>
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Upon the successful establishment of the IPsec tunnel, an updown script automatically
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inserts iptables-based firewall rules that let pass the traffic tunneled via the
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<b>ipsec0</b> tun interface. In order to test both tunnel and firewall, client <b>alice</b>
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behind gateway <b>moon</b> pings client <b>bob</b> located behind gateway <b>sun</b>.
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moon::swanctl --list-pols --raw 2> /dev/null::net-net.*mode=TUNNEL local-ts=\[10.1.0.0/16] remote-ts=\[10.2.0.0/16]::YES
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moon::cat /var/log/daemon.log::could not find an outbound IPsec SA for reqid {1}, dropping packet and triggering acquire::YES
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moon::cat /var/log/daemon.log::creating acquire job for policy with reqid {1}::YES
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alice::ping -c 1 PH_IP_BOB::64 bytes from PH_IP_BOB: icmp_.eq=1::YES
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moon:: swanctl --list-sas --raw 2> /dev/null::gw-gw.*version=2 state=ESTABLISHED local-host=192.168.0.1 local-port=4500 local-id=moon.strongswan.org remote-host=192.168.0.2 remote-port=4500 remote-id=sun.strongswan.org initiator=yes.*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=CURVE_25519.*child-sas.*net-net.*reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.1.0.0/16] remote-ts=\[10.2.0.0/16]::YES
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sun::swanctl --list-sas --raw 2> /dev/null::gw-gw.*version=2 state=ESTABLISHED local-host=192.168.0.2 local-port=4500 local-id=sun.strongswan.org remote-host=192.168.0.1 remote-port=4500 remote-id=moon.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=CURVE_25519.*child-sas.*net-net.*reqid=1 state=INSTALLED mode=TUNNEL protocol=ESP encap=yes.*encr-alg=AES_GCM_16 encr-keysize=128.*local-ts=\[10.2.0.0/16] remote-ts=\[10.1.0.0/16]::YES
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sun::tcpdump::IP moon.strongswan.org.\(4500\|ipsec-nat-t\) > sun.strongswan.org.\(4500\|ipsec-nat-t\): UDP-encap: ESP::YES
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sun::tcpdump::IP sun.strongswan.org.\(4500\|ipsec-nat-t\) > moon.strongswan.org.\(4500\|ipsec-nat-t\): UDP-encap: ESP::YES
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# /etc/strongswan.conf - strongSwan configuration file
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swanctl {
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load = pem pkcs1 x509 revocation constraints pubkey openssl random
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}
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charon-systemd {
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load = random nonce aes sha1 sha2 gcm pem pkcs1 curve25519 gmp x509 curl revocation hmac kdf vici kernel-libipsec kernel-netlink socket-default updown
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multiple_authentication = no
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}
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connections {
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gw-gw {
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local_addrs = 192.168.0.1
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remote_addrs = 192.168.0.2
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local {
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auth = pubkey
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certs = moonCert.pem
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id = moon.strongswan.org
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}
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remote {
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auth = pubkey
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id = sun.strongswan.org
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}
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children {
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net-net {
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local_ts = 10.1.0.0/16
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remote_ts = 10.2.0.0/16
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start_action = trap
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updown = /etc/updown
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esp_proposals = aes128gcm128-x25519
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}
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}
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version = 2
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mobike = no
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proposals = aes128-sha256-x25519
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}
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}
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#!/bin/sh
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TUN_NAME=ipsec0
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# use protocol specific options to set ports
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case "$PLUTO_MY_PROTOCOL" in
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1) # ICMP
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ICMP_TYPE_OPTION="--icmp-type"
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;;
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58) # ICMPv6
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ICMP_TYPE_OPTION="--icmpv6-type"
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;;
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*)
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;;
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esac
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# are there port numbers?
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if [ "$PLUTO_MY_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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S_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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D_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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else
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S_MY_PORT="--sport $PLUTO_MY_PORT"
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D_MY_PORT="--dport $PLUTO_MY_PORT"
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fi
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fi
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if [ "$PLUTO_PEER_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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# the syntax is --icmp[v6]-type type[/code], so add it to the existing option
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S_MY_PORT="$S_MY_PORT/$PLUTO_PEER_PORT"
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D_MY_PORT="$D_MY_PORT/$PLUTO_PEER_PORT"
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else
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S_PEER_PORT="--sport $PLUTO_PEER_PORT"
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D_PEER_PORT="--dport $PLUTO_PEER_PORT"
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fi
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fi
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case "$PLUTO_VERB" in
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up-client)
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iptables -I FORWARD 1 -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -I FORWARD 1 -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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down-client)
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iptables -D FORWARD -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -D FORWARD -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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esac
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# /etc/strongswan.conf - strongSwan configuration file
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swanctl {
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load = pem pkcs1 x509 revocation constraints pubkey openssl random
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}
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charon-systemd {
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load = random nonce aes sha1 sha2 gcm pem pkcs1 curve25519 gmp x509 curl revocation hmac kdf vici kernel-libipsec kernel-netlink socket-default updown
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multiple_authentication = no
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}
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connections {
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gw-gw {
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local_addrs = 192.168.0.2
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remote_addrs = 192.168.0.1
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local {
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auth = pubkey
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certs = sunCert.pem
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id = sun.strongswan.org
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}
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remote {
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auth = pubkey
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id = moon.strongswan.org
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}
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children {
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net-net {
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local_ts = 10.2.0.0/16
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remote_ts = 10.1.0.0/16
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start_action = none
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updown = /etc/updown
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esp_proposals = aes128gcm128-x25519
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}
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}
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version = 2
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mobike = no
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proposals = aes128-sha256-x25519
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}
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}
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#!/bin/sh
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TUN_NAME=ipsec0
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# use protocol specific options to set ports
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case "$PLUTO_MY_PROTOCOL" in
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1) # ICMP
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ICMP_TYPE_OPTION="--icmp-type"
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;;
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58) # ICMPv6
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ICMP_TYPE_OPTION="--icmpv6-type"
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;;
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*)
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;;
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esac
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# are there port numbers?
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if [ "$PLUTO_MY_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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S_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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D_MY_PORT="$ICMP_TYPE_OPTION $PLUTO_MY_PORT"
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else
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S_MY_PORT="--sport $PLUTO_MY_PORT"
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D_MY_PORT="--dport $PLUTO_MY_PORT"
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fi
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fi
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if [ "$PLUTO_PEER_PORT" != 0 ]
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then
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if [ -n "$ICMP_TYPE_OPTION" ]
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then
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# the syntax is --icmp[v6]-type type[/code], so add it to the existing option
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S_MY_PORT="$S_MY_PORT/$PLUTO_PEER_PORT"
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D_MY_PORT="$D_MY_PORT/$PLUTO_PEER_PORT"
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else
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S_PEER_PORT="--sport $PLUTO_PEER_PORT"
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D_PEER_PORT="--dport $PLUTO_PEER_PORT"
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fi
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fi
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case "$PLUTO_VERB" in
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up-client)
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iptables -I FORWARD 1 -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -I FORWARD 1 -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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down-client)
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iptables -D FORWARD -o $TUN_NAME -p $PLUTO_PEER_PROTOCOL \
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-s $PLUTO_MY_CLIENT $S_MY_PORT \
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-d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT
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iptables -D FORWARD -i $TUN_NAME -p $PLUTO_MY_PROTOCOL \
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-s $PLUTO_PEER_CLIENT $S_PEER_PORT \
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-d $PLUTO_MY_CLIENT $D_MY_PORT -j ACCEPT
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;;
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esac
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moon::swanctl --terminate --ike gw-gw 2> /dev/null
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moon::systemctl stop strongswan
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sun::systemctl stop strongswan
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moon::iptables-restore < /etc/iptables.flush
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sun::iptables-restore < /etc/iptables.flush
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moon::iptables-restore < /etc/iptables.rules
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# allow traffic from local subnet via TUN device before SA is up
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moon::iptables -I FORWARD -o ipsec0 -s 10.1.0.0/16 -d 10.2.0.0/16 -j ACCEPT
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sun::iptables-restore < /etc/iptables.rules
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moon::systemctl start strongswan
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sun::systemctl start strongswan
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moon::expect-connection gw-gw
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sun::expect-connection gw-gw
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alice::ping -c 3 -W 1 -i 0.2 PH_IP_BOB
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#!/bin/bash
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#
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# This configuration file provides information on the
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# guest instances used for this test
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# All guest instances that are required for this test
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#
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VIRTHOSTS="alice moon winnetou sun bob"
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# Corresponding block diagram
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#
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DIAGRAM="a-m-w-s-b.png"
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# Guest instances on which tcpdump is to be started
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#
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TCPDUMPHOSTS="sun"
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# Guest instances on which IPsec is started
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# Used for IPsec logging purposes
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#
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IPSECHOSTS="moon sun"
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# charon controlled by swanctl
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#
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SWANCTL=1
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