root@vmw02-srv:~# ngrep -d eth1 -qt -W byline port 5060
interface: eth1 (192.168.0.0/255.255.255.0)
filter: (ip or ip6) and ( port 5060 )

U 2008/03/20 13:57:31.763060 192.168.0.25:5060 -> 192.168.0.10:5060
REGISTER sip:spo.voip.br SIP/2.0.
Via: SIP/2.0/UDP 192.168.0.25;rport;branch=z9hG4bKignjupsg.
Max-Forwards: 70.
To: "vmwcli03" <sip:vmwcli03@spo.voip.br>.
From: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=dcoan.
Call-ID: iswtwciijecswfp@192.168.0.25.
CSeq: 883 REGISTER.
Contact: <sip:vmwcli03@192.168.0.25>;expires=3600.
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO.
User-Agent: Twinkle/1.0.
Content-Length: 0.
.


U 2008/03/20 13:57:32.333159 192.168.0.25:5060 -> 192.168.0.10:5060
REGISTER sip:spo.voip.br SIP/2.0.
Via: SIP/2.0/UDP 192.168.0.25;rport;branch=z9hG4bKignjupsg.
Max-Forwards: 70.
To: "vmwcli03" <sip:vmwcli03@spo.voip.br>.
From: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=dcoan.
Call-ID: iswtwciijecswfp@192.168.0.25.
CSeq: 883 REGISTER.
Contact: <sip:vmwcli03@192.168.0.25>;expires=3600.
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO.
User-Agent: Twinkle/1.0.
Content-Length: 0.
.


U 2008/03/20 13:57:33.321952 192.168.0.25:5060 -> 192.168.0.10:5060
REGISTER sip:spo.voip.br SIP/2.0.
Via: SIP/2.0/UDP 192.168.0.25;rport;branch=z9hG4bKignjupsg.
Max-Forwards: 70.
To: "vmwcli03" <sip:vmwcli03@spo.voip.br>.
From: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=dcoan.
Call-ID: iswtwciijecswfp@192.168.0.25.
CSeq: 883 REGISTER.
Contact: <sip:vmwcli03@192.168.0.25>;expires=3600.
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO.
User-Agent: Twinkle/1.0.
Content-Length: 0.
.


U 2008/03/20 13:57:35.309584 192.168.0.25:5060 -> 192.168.0.10:5060
REGISTER sip:spo.voip.br SIP/2.0.
Via: SIP/2.0/UDP 192.168.0.25;rport;branch=z9hG4bKignjupsg.
Max-Forwards: 70.
To: "vmwcli03" <sip:vmwcli03@spo.voip.br>.
From: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=dcoan.
Call-ID: iswtwciijecswfp@192.168.0.25.
CSeq: 883 REGISTER.
Contact: <sip:vmwcli03@192.168.0.25>;expires=3600.
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO.
User-Agent: Twinkle/1.0.
Content-Length: 0.
.


U 2008/03/20 13:57:37.026703 192.168.0.10:5060 -> 192.168.0.25:5060
SIP/2.0 483 Too Many Hops.
Via: SIP/2.0/UDP 192.168.0.25;rport=5060;branch=z9hG4bKignjupsg.
To: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=1333af5435552d3677a0ca954c3a6e9f.6889.
From: "vmwcli03" <sip:vmwcli03@spo.voip.br>;tag=dcoan.
Call-ID: iswtwciijecswfp@192.168.0.25.
CSeq: 883 REGISTER.
Server: OpenSER (1.3.0-notls (i386/linux)).
Content-Length: 0.