TCPDUMP

moon# 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
 * Starting firewall ...                                                  [ ok ]

carol# /etc/init.d/iptables start 2> /dev/null
 * Starting firewall ...                                                  [ ok ]

carol# ipsec start
Starting strongSwan IPsec 2.8.11 [starter]...

moon# ipsec start
Starting strongSwan IPsec 2.8.11 [starter]...

carol# ipsec up home
002 "home" #1: initiating Main Mode
104 "home" #1: STATE_MAIN_I1: initiate
003 "home" #1: ignoring Vendor ID payload [strongSwan 2.8.11]
003 "home" #1: received Vendor ID payload [XAUTH]
003 "home" #1: received Vendor ID payload [Dead Peer Detection]
106 "home" #1: STATE_MAIN_I2: sent MI2, expecting MR2
002 "home" #1: we have a cert and are sending it 
108 "home" #1: STATE_MAIN_I3: sent MI3, expecting MR3
002 "home" #1: Peer ID is ID_FQDN: '@moon.strongswan.org'
002 "home" #1: crl not found
002 "home" #1: certificate status unknown
002 "home" #1: ISAKMP SA established
004 "home" #1: STATE_MAIN_I4: ISAKMP SA established
002 "home" #2: initiating Quick Mode RSASIG+ENCRYPT+AUTHENTICATE+PFS+UP {using isakmp#1}
112 "home" #2: STATE_QUICK_I1: initiate
002 "home" #2: sent QI2, IPsec SA established {ESP=>0x96b6d923 <0x14c82779 AH=>0x18f79274 <0x81d032e7}
004 "home" #2: STATE_QUICK_I2: sent QI2, IPsec SA established {ESP=>0x96b6d923 <0x14c82779 AH=>0x18f79274 <0x81d032e7}


TEST

carol# ipsec status | grep 'home.*STATE_QUICK_I2.*IPsec SA established' [YES]
000 #2: "home" STATE_QUICK_I2 (sent QI2, IPsec SA established); EVENT_SA_REPLACE in 990s; newest IPSEC; eroute owner

moon# ipsec status | grep 'rw.*STATE_QUICK_R2.*IPsec SA established' [YES]
000 #2: "rw"[1] 192.168.0.100 STATE_QUICK_R2 (IPsec SA established); EVENT_SA_REPLACE in 1109s; newest IPSEC; eroute owner

carol# ipsec statusall | grep 'ESP algorithm newest: AES_128-;' [YES]
000 "home":   ESP algorithm newest: AES_128-; pfsgroup=<Phase1>

moon# ipsec statusall | grep 'ESP algorithm newest: AES_128-;' [YES]
000 "rw"[1]:   ESP algorithm newest: AES_128-; pfsgroup=<Phase1>

carol# ping -c 1 -s 120 -p deadbeef 192.168.0.1 | grep '128 bytes from 192.168.0.1: icmp_seq=1' [YES]
128 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.461 ms

carol# ipsec status | grep 'ah\..*ah\..*esp\..*ago.*esp\..*ago.*transport' [YES]
000 #2: "home" ah.18f79274@192.168.0.1 ah.81d032e7@192.168.0.100 esp.96b6d923@192.168.0.1 (128 bytes, 0s ago) esp.14c82779@192.168.0.100 (128 bytes, 0s ago); transport

moon# ipsec status | grep 'ah\..*ah\..*esp\..*ago.*esp\..*ago.*transport' [YES]
000 #2: "rw"[1] 192.168.0.100 ah.81d032e7@192.168.0.100 ah.18f79274@192.168.0.1 esp.14c82779@192.168.0.100 (128 bytes, 1s ago) esp.96b6d923@192.168.0.1 (128 bytes, 1s ago); transport

moon# killall tcpdump

moon# cat /tmp/tcpdump.log | grep 'AH.*ESP' [YES]
07:01:21.803990 IP carol.strongswan.org > moon.strongswan.org: AH(spi=0x18f79274,seq=0x1): ESP(spi=0x96b6d923,seq=0x1), length 168
07:01:21.804078 IP moon.strongswan.org > carol.strongswan.org: AH(spi=0x81d032e7,seq=0x1): ESP(spi=0x14c82779,seq=0x1), length 168


POST-TEST

moon# iptables -v -n -L
Chain INPUT (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    1   148 ACCEPT     all  --  eth0   *       192.168.0.100        192.168.0.1         policy match dir in pol ipsec reqid 16389 proto 50 
    1   212 ACCEPT     ah   --  eth0   *       0.0.0.0/0            0.0.0.0/0           
    5  2368 ACCEPT     udp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           udp spt:500 dpt:500 
    4  1008 ACCEPT     tcp  --  eth0   *       192.168.0.150        0.0.0.0/0           tcp spt:80 
  368 41973 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           tcp dpt:22 

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    1   148 ACCEPT     all  --  *      eth0    192.168.0.1          192.168.0.100       policy match dir out pol ipsec reqid 16389 proto 50 
    1   212 ACCEPT     ah   --  *      eth0    0.0.0.0/0            0.0.0.0/0           
    4  2236 ACCEPT     udp  --  *      eth0    0.0.0.0/0            0.0.0.0/0           udp spt:500 dpt:500 
    6   391 ACCEPT     tcp  --  *      eth0    0.0.0.0/0            192.168.0.150       tcp dpt:80 
  413 66667 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           tcp spt:22 

carol# iptables -v -n -L
Chain INPUT (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    1   148 ACCEPT     all  --  eth0   *       192.168.0.1          192.168.0.100       policy match dir in pol ipsec reqid 16385 proto 50 
    1   212 ACCEPT     ah   --  eth0   *       0.0.0.0/0            0.0.0.0/0           
    4  2236 ACCEPT     udp  --  eth0   *       0.0.0.0/0            0.0.0.0/0           udp spt:500 dpt:500 
    4  1008 ACCEPT     tcp  --  eth0   *       192.168.0.150        0.0.0.0/0           tcp spt:80 
  296 38261 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           tcp dpt:22 

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    1   148 ACCEPT     all  --  *      eth0    192.168.0.100        192.168.0.1         policy match dir out pol ipsec reqid 16385 proto 50 
    1   212 ACCEPT     ah   --  *      eth0    0.0.0.0/0            0.0.0.0/0           
    5  2368 ACCEPT     udp  --  *      eth0    0.0.0.0/0            0.0.0.0/0           udp spt:500 dpt:500 
    6   391 ACCEPT     tcp  --  *      eth0    0.0.0.0/0            192.168.0.150       tcp dpt:80 
  345 57067 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           tcp spt:22 

moon# ipsec stop
Stopping strongSwan IPsec...

carol# ipsec stop
Stopping strongSwan IPsec...

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

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