[SIPForum-discussion] How sip proxy do about Contact header

[Santosh Iyer]

It all depends on the network topology, if both the endpoints are in the same subnet or can be routed then its OK if the contact is not changed. If the two endpoints are connected through the public internet then you need to change the contact to a public IP which can be achieved by a SBC or a SIP aware firewall.
Santosh

--- On Sat, 9/29/12, Guan Xsun <guanxiansun at gmail.com> wrote:

From: Guan Xsun <guanxiansun at gmail.com>
Subject: [SIPForum-discussion] How sip proxy do about Contact header
To: discussion at sipforum.org
Date: Saturday, September 29, 2012, 2:24 PM

Hi,All,    This is my case:    UAC<--------------------------------------------------------------------------->SIP Proxy<------------------------------------------------------->UAC    INVITE                                                                  INVITE 
    From: <sip:123456 at 192.168.10.188>                      From: <sip:123456 at 192.168.10.188>      To:<sip:6543d21 at 192.168.10.188>                          To:<sip:6543d21 at 192.168.10.188>
    Contact:<sip:333333 at 192.168.10.188:5060>            Contact:<sip:????@192.168.10.188:5060>

   So, I want to ask what can my sip proxy can set in "Contact" header?   and my sip proxy is statefull.
   Best Regards!
  Casey   
   


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