TCPDUMP

sun# tcpdump -i eth0 not port ssh and not port domain and not arp > /tmp/tcpdump.log 2>&1 &

PRE-TEST

moon# /etc/init.d/iptables start 2> /dev/null
 * Caching service dependencies ...                                       [ ok ]
 * Starting firewall ...                                                  [ ok ]

sun# /etc/init.d/iptables start 2> /dev/null
 * Caching service dependencies ...                                       [ ok ]
 * Starting firewall ...                                                  [ ok ]

moon# ipsec start
Starting strongSwan 4.3.6 IPsec [starter]...

sun# ipsec start
Starting strongSwan 4.3.6 IPsec [starter]...

moon# sleep 2 

moon# ipsec up host-host
002 "host-host" #1: initiating Main Mode
104 "host-host" #1: STATE_MAIN_I1: initiate
003 "host-host" #1: ignoring Vendor ID payload [strongSwan]
003 "host-host" #1: received Vendor ID payload [XAUTH]
003 "host-host" #1: received Vendor ID payload [Dead Peer Detection]
106 "host-host" #1: STATE_MAIN_I2: sent MI2, expecting MR2
002 "host-host" #1: we have a cert and are sending it upon request
108 "host-host" #1: STATE_MAIN_I3: sent MI3, expecting MR3
002 "host-host" #1: Peer ID is ID_FQDN: 'sun.strongswan.org'
002 "host-host" #1: crl not found
002 "host-host" #1: certificate status unknown
002 "host-host" #1: ISAKMP SA established
004 "host-host" #1: STATE_MAIN_I4: ISAKMP SA established
002 "host-host" #2: initiating Quick Mode PUBKEY+ENCRYPT+PFS+UP {using isakmp#1}
112 "host-host" #2: STATE_QUICK_I1: initiate
002 "host-host" #2: sent QI2, IPsec SA established {ESP=>0x178346c9 <0xb8c1a99c}
004 "host-host" #2: STATE_QUICK_I2: sent QI2, IPsec SA established {ESP=>0x178346c9 <0xb8c1a99c}

moon# sleep 1


TEST

moon# ipsec status | grep 'host-host.*STATE_QUICK_I2.*IPsec SA established' [YES]
000 #2: "host-host" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 949s; newest IPSEC; eroute owner

sun# ipsec status | grep 'host-host.*STATE_QUICK_R2.*IPsec SA established' [YES]
000 #2: "host-host" STATE_QUICK_R2 (IPsec SA established); EVENT_SA_REPLACE in 1109s; newest IPSEC; eroute owner

moon# ip xfrm state | grep 'mode transport' [YES]
	proto esp spi 0x178346c9 reqid 16385 mode transport
	proto esp spi 0xb8c1a99c reqid 16385 mode transport

sun# ip xfrm state | grep 'mode transport' [YES]
	proto esp spi 0xb8c1a99c reqid 16385 mode transport
	proto esp spi 0x178346c9 reqid 16385 mode transport

moon# ping6 -c 1 -p deadbeef ip6-sun.strongswan.org | grep '64 bytes from ip6-sun.strongswan.org: icmp_seq=1' [YES]
64 bytes from ip6-sun.strongswan.org: icmp_seq=1 ttl=64 time=0.437 ms

sun# killall tcpdump

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP' [YES]
01:05:17.494957 IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP(spi=0x178346c9,seq=0x1), length 116

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP' [YES]
01:05:17.495083 IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP(spi=0xb8c1a99c,seq=0x1), length 116


POST-TEST

moon# ipsec stop
Stopping strongSwan IPsec...

sun# ipsec stop
Stopping strongSwan IPsec...

moon# /etc/init.d/iptables stop 2> /dev/null
 * Stopping firewall ...                                                  [ ok ]

sun# /etc/init.d/iptables stop 2> /dev/null
 * Stopping firewall ...                                                  [ ok ]