The main difference is that ping now reports icmp_seq instead of
icmp_req, so we match for icmp_.eq, which works with both releases.
tcpdump now also reports port 4500 as ipsec-nat-t.
A connection between the hosts moon and sun is set up. The host moon
uses the Trusted Key Manager (TKM) and is the initiator of the transport
connection. The authentication is based on X.509 certificates.
Tobias Brunner