tcpdump output:

00:46:00.239126 IP 192.168.2.4 > auth.gr: ICMP 192.168.2.4 protocol 1 port 65535 unreachable, length 36


console:

nmap -sO auth.gr

Starting Nmap 4.20 ( http://insecure.org ) at 2007-05-28 00:45 EEST
Interesting protocols on auth.gr (155.207.1.32):
Not shown: 253 open|filtered protocols
PROTOCOL STATE    SERVICE
1        open     icmp
6        open     tcp
17       filtered udp

Nmap finished: 1 IP address (1 host up) scanned in 7.665 seconds