[root@mnsnet]# /usr/sbin/tcpdump -n -i any


07:36.arp who-has 192.168.0.254 tell 192.168.0.30
07:36.arp reply 192.168.0.254 is-at 00:07:cb:1a:16:3d
07:36.IP 192.168.0.30.filenet-nch > 212.27.54.252.domain:
	 37820+ A? mail.univ-tln.fr.
07:36.IP 212.27.54.252.domain > 192.168.0.30.filenet-nch:  
	 37820 1/0/0 A 193.49.96.2
07:36.IP 192.168.0.30 > 193.49.96.2: ICMP echo request, 
	 id 6933, seq 1, length 64
07:36.IP 193.49.96.2 > 192.168.0.30: ICMP echo reply, 
	 id 6933, seq 1, length 64
07:36.IP 192.168.0.30.filenet-nch > 212.27.54.252.domain:  
	 52476+ PTR? 2.96.49.193.in-addr.arpa. (42)