asterisk*CLI>
<--- SIP read from 84.201.226.145:13164 --->
REGISTER sip:p.one.by:5060 SIP/2.0
Via: SIP/2.0/UDP  84.201.226.145:13164:5060;branch=z9hG4bK4617EA
From: "3402" <sip:3402@p.one.by>;tag=34BDD2-1B0D
To: "3402" <sip:3402@p.one.by>
Date: Thu, 21 Mar 2002 11:08:05 GMT
Call-ID: 36B147B-3BEB11D6-8009E391-55C044FD
User-Agent: Cisco-SIPGateway/IOS-12.x
Max-Forwards: 70
Timestamp: 1016708885
CSeq: 23 REGISTER
Contact: <sip:3402@84.201.226.145:13164:5060>
Expires: 600
Content-Length: 0



asterisk*CLI>
<--- Transmitting (NAT) to 84.201.226.145:13164 --->
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP  84.201.226.145:13164:5060;branch=z9hG4bK4617EA;received=84.201.226.145
From: "3402" <sip:3402@p.one.by>;tag=34BDD2-1B0D
To: "3402" <sip:3402@p.one.by>;tag=as061c9667
Call-ID: 36B147B-3BEB11D6-8009E391-55C044FD
CSeq: 23 REGISTER
User-Agent: Asterisk PBX SVN-trunk-r71158
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Supported: replaces
WWW-Authenticate: Digest algorithm=MD5, realm="asterisk", nonce="48c6cd19"
Content-Length: 0