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 4.1.11 IPsec [starter]... sun# ipsec start Starting strongSwan 4.1.11 IPsec [starter]... moon# sleep 2 moon# ipsec up host-host initiating IKE_SA 'host-host' to fec0::2 IKE_SA 'host-host' 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 N(USE_TRANSP) ] 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(USE_TRANSP) 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 received USE_TRANSPORT_MODE notify authentication of 'sun.strongswan.org' with RSA signature successful IKE_SA 'host-host' state change: CONNECTING => ESTABLISHED scheduling reauthentication in 3336s maximum IKE_SA lifetime 3516s IKE_SA 'host-host' established between moon.strongswan.org[fec0::1]...[fec0::2]sun.strongswan.org CHILD_SA 'host-host' established successfully TEST moon# cat /var/log/daemon.log | grep 'received USE_TRANSPORT_MODE notify' [YES] Feb 29 19:54:56 moon charon: 11[IKE] received USE_TRANSPORT_MODE notify moon# ipsec status | grep 'host-host.*INSTALLED.*TRANSPORT' [YES] host-host{1}: INSTALLED, TRANSPORT, ESP SPIs: cd30595a_i c892bc78_o sun# ipsec status | grep 'host-host.*INSTALLED.*TRANSPORT' [YES] host-host{1}: INSTALLED, TRANSPORT, ESP SPIs: c892bc78_i cd30595a_o moon# ip xfrm state | grep 'mode transport' [YES] proto esp spi 0xcd30595a reqid 1 mode transport proto esp spi 0xc892bc78 reqid 1 mode transport sun# ip xfrm state | grep 'mode transport' [YES] proto esp spi 0xcd30595a reqid 1 mode transport proto esp spi 0xc892bc78 reqid 1 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=0.216 ms sun# killall tcpdump sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP' [YES] 19:54:57.389480 IP6 ip6-moon.strongswan.org > ip6-sun.strongswan.org: ESP(spi=0xc892bc78,seq=0x1), length 116 sun# cat /tmp/tcpdump.log | grep 'IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP' [YES] 19:54:57.389551 IP6 ip6-sun.strongswan.org > ip6-moon.strongswan.org: ESP(spi=0xcd30595a,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 ]