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 ]

sun# ipsec start
Starting strongSwan 4.2.10 IPsec [starter]...

sun# sleep 2

moon# ipsec start
Starting strongSwan 4.2.10 IPsec [starter]...

alice# sleep 3 


TEST

moon# ipsec statusall | grep 'net-net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: c6842632_i c3f4be6f_o

sun# ipsec statusall | grep 'net-net.*INSTALLED' [YES]
     net-net{1}:  INSTALLED, TUNNEL, ESP SPIs: c3f4be6f_i c6842632_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=5.94 ms

sun# killall tcpdump

sun# cat /tmp/tcpdump.log | grep 'IP moon.strongswan.org > sun.strongswan.org: ESP' [YES]
11:18:04.130575 IP moon.strongswan.org > sun.strongswan.org: ESP(spi=0xc3f4be6f,seq=0x1), length 132

sun# cat /tmp/tcpdump.log | grep 'IP sun.strongswan.org > moon.strongswan.org: ESP' [YES]
11:18:04.133659 IP sun.strongswan.org > moon.strongswan.org: ESP(spi=0xc6842632,seq=0x1), length 132


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 ]