TCPDUMP

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

PRE-TEST

moon# echo 1 > /proc/sys/net/ipv4/ip_forward

sun# echo 1 > /proc/sys/net/ipv4/ip_forward

moon# ipsec start
Starting strongSwan 4.2.17 IPsec [starter]...

sun# ipsec start
Starting strongSwan 4.2.17 IPsec [starter]...

moon# sleep 2 

moon# ipsec up net-net
initiating IKE_SA net-net[1] to fec0::2
generating IKE_SA_INIT request 0 [ SA KE No N(NATD_S_IP) N(NATD_D_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 ]
received cert request for "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
sending cert request for "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
authentication of 'moon.strongswan.org' (myself) with RSA signature successful
sending end entity cert "C=CH, O=Linux strongSwan, CN=moon.strongswan.org"
establishing CHILD_SA net-net
generating IKE_AUTH request 1 [ IDi CERT CERTREQ 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) ]
received end entity cert "C=CH, O=Linux strongSwan, CN=sun.strongswan.org"
  using certificate "C=CH, O=Linux strongSwan, CN=sun.strongswan.org"
  using trusted ca certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
checking certificate status of "C=CH, O=Linux strongSwan, CN=sun.strongswan.org"
  fetching crl from 'http://crl.strongswan.org/strongswan.crl' ...
  using trusted certificate "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
  crl correctly signed by "C=CH, O=Linux strongSwan, CN=strongSwan Root CA"
  crl is valid: until Aug 19 13:47:17 2009
certificate status is good
authentication of 'sun.strongswan.org' with RSA signature successful
scheduling reauthentication in 3374s
maximum IKE_SA lifetime 3554s
IKE_SA net-net[1] established between fec0::1[moon.strongswan.org]...fec0::2[sun.strongswan.org]


TEST

moon# ipsec status | grep 'net-net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: c3edce70_i c17c26ee_o

sun# ipsec status | grep 'net.net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: c17c26ee_i c3edce70_o

alice# ping -c 1 10.2.0.10 | grep '64 bytes from 10.2.0.10: icmp_seq=1' [YES]
64 bytes from 10.2.0.10: icmp_seq=1 ttl=62 time=30.1 ms

sun# killall tcpdump

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP' [YES]
16:51:34.329399 IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP(spi=0xc17c26ee,seq=0x1), length 132

sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP' [YES]
16:51:34.348430 IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP(spi=0xc3edce70,seq=0x1), length 132


POST-TEST

moon# ipsec stop
Stopping strongSwan IPsec...

sun# ipsec stop
Stopping strongSwan IPsec...