Subject: [SIP] When the registra(or proxy) received a packet that topmost via header does not match received addr ?

From: 이희석 <[email-masked]>
Date: Thu, 22 Mar 2001 09:10:25 +0900

UAc send a REGISTER message via it's NAT box.

this is UAc's REGISTER message

REGISTER sip:210.221.183.29 SIP/2.0
Via: SIP/2.0/UDP 128.1.1.1:5060
From: jinho <sip:[email-masked]>
To: jinho <sip:[email-masked]>
Cseq: 1 REGISTER
Call-ID: [email-masked]
Contact: jinho <sip:[email-masked]>
Content-Length: 0
Expires: 999999999

source ip address(NAT) : 222.154.182.25

At this time,
 what the registra(or proxy) server saves UAc's real address?

222.154.182.25 or 
128.1.1.1

I think that it is 222.154.182.25 absolutely. How do yours think about that ?

Best regards!!!

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