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 ]

alice# ip route add fec2::/16 via fec1::1

moon# ip route add fec2::/16 via fec0::2

sun# ip route add fec1::/16 via fec0::1

bob# ip route add fec1::/16 via fec2::1

moon# ipsec start
Starting strongSwan 4.1.11 IPsec [starter]...

sun# ipsec start
Starting strongSwan 4.1.11 IPsec [starter]...

moon# sleep 2 

moon# ipsec up net-net
initiating IKE_SA 'net-net' to fec0::2
IKE_SA 'net-net' state change: CREATED => CONNECTING
generating IKE_SA_INIT request 0 [ SA KE No N(NATD_D_IP) N(NATD_S_IP) ]
sending packet: from fec0::1[500] to fec0::2[500]
received packet: from fec0::2[500] to fec0::1[500]
parsed IKE_SA_INIT response 0 [ SA KE No N(NATD_S_IP) N(NATD_D_IP) CERTREQ ]
authentication of 'moon.strongswan.org' (myself) with RSA signature
establishing CHILD_SA
generating IKE_AUTH request 1 [ IDi CERTREQ CERT IDr AUTH SA TSi TSr ]
sending packet: from fec0::1[500] to fec0::2[500]
received packet: from fec0::2[500] to fec0::1[500]
parsed IKE_AUTH response 1 [ IDr CERT AUTH SA TSi TSr N(AUTH_LFT) ]
verifying end entity certificate up to trust anchor:
subject: 'C=CH, O=Linux strongSwan, CN=sun.strongswan.org'
issuer:  'C=CH, O=Linux strongSwan, CN=strongSwan Root CA'
keyid:    da:9c:6f:a7:2d:c3:33:63:ac:09:b9:9a:f2:90:85:be:dd:48:dc:27
issuer does not enforce a strict crl policy
no crl is locally available
sending curl request to 'http://crl.strongswan.org/strongswan.crl'...
received valid curl response
certificate is good
going up one step in the certificate trust chain (1)
subject: 'C=CH, O=Linux strongSwan, CN=strongSwan Root CA'
issuer:  'C=CH, O=Linux strongSwan, CN=strongSwan Root CA'
keyid:    ae:09:6b:87:b4:48:86:d3:b8:20:97:86:23:da:bd:0e:ae:22:eb:bc
reached self-signed root ca
authentication of 'sun.strongswan.org' with RSA signature successful
IKE_SA 'net-net' state change: CONNECTING => ESTABLISHED
scheduling reauthentication in 3369s
maximum IKE_SA lifetime 3549s
IKE_SA 'net-net' established between moon.strongswan.org[fec0::1]...[fec0::2]sun.strongswan.org
CHILD_SA 'net-net' established successfully


TEST

moon# ipsec status | grep 'net-net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: ce0d62e5_i c8d93590_o

sun# ipsec status | grep 'net.net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: c8d93590_i ce0d62e5_o

alice# ping6 -c 1 -p deadbeef ip6-bob.strongswan.org | grep '64 bytes from ip6-bob.strongswan.org: icmp_seq=1' [YES]
64 bytes from ip6-bob.strongswan.org: icmp_seq=1 ttl=62 time=1.47 ms

sun# killall tcpdump

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP' [YES]
19:53:21.914932 IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP(spi=0xc8d93590,seq=0x1), length 148

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP' [YES]
19:53:21.916002 IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP(spi=0xce0d62e5,seq=0x1), length 148


POST-TEST

moon# ipsec stop
Stopping strongSwan IPsec...

sun# ipsec stop
Stopping strongSwan IPsec...

alice# ip route del fec2::/16 via fec1::1

moon# ip route del fec2::/16 via fec0::2

sun# ip route del fec1::/16 via fec0::1

bob# ip route del fec1::/16 via fec2::1

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

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