[SIPForum-discussion] From field in SIP header

[Sreeji Gopal]

Fredrik,

I guess u need to analyze your packets, just do this, install ethereal or wireShark tool ru on ur box, see the different sip message exchanged, check the SDP information on the 200 Ok response from ur sip endpoint. I guess u may not have configured the codecs properly. If ur get a 200 Ok check for RTP pay load from source to dest and dest to source IP.

Thanks,
-Sreeji
 
Sreeji Gopal | 94490 22324


----- Original Message ----
From: Ankit Gupta <ankit.g at pyronetworks.com>
To: Fredrik Sandedal <fredrik.sandedal at enera.se>
Cc: discussion at sipforum.org
Sent: Friday, November 30, 2007 8:03:48 PM
Subject: Re: [SIPForum-discussion] From field in SIP header





  
  

you can check with your network analyzer(Ethereal) in which port it is coming ............after it media proxy redirected RTP packets  till you.



nothing wrong with your  from field.



 















On Fri, 2007-11-30 at 08:11 +0100, Fredrik Sandedal wrote:


    Hello,

    

     

    

    I have a question regarding the “From” field in the SIP header.

    

     

    

    I send an INVITE request from within our LAN and through a SIP supporting firewall to a SIP termination service.

    

    The firewall changes IP-address of the “Contact” field from 192.168.1.33 to the firewall’s WAN IP but the “From” field still has the LAN IP-address.

    

     

    

    LAN

    

    From: <sip:02073367100 at 192.168.1.33:5060>;tag=….

    

    Contact: <sip:02073367100 at 192.168.1.33:5060>

    

     

    

    WAN (after passing firewall)

    

    Via: SIP/2.0/UDP 88.131….:5060;branch=…

    

    From: <sip:02073367100 at 192.168.1.33:5060>;tag=….

    

    Contact: <sip:02073367100 at 88.131….:5060>

    

     

    

    Is this a correct behavior? The reason I’m asking is because I do not receive any RTP traffic from the SIP termination service.

    

     

    

    Kind regards,

    

    Fredrik Sandedal, Enera

    

     

    

    

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