[SIPForum-discussion] From field in SIP header

[Rohin Koul]

Yes I guess IPs in SDP should change as well .. unless both talking UEs are
in your local network.

RTP is sent to IP/Port mentioned in SDP .. SIP From To etc should not have
anything to do with it.

regs

Rohin


On 30/11/2007, Fredrik Sandedal <fredrik.sandedal at enera.se> wrote:
>
>  Hi,
>
>
>
> Thanks for your answer.
>
>
>
> Do you mean that the IP references in the SDP should change when the
> packets pass the firewall?
>
> In the trace from the WAN-side of the firewall all IP references in the
> SDP are to the local IP address. Not to the WAN address of the firewall.
>
>
>
> Regards
>
>
>
> Fredrik Sandedal, Enera
>  ------------------------------
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Rohin Koul
> *Sent:* Friday, November 30, 2007 8:59 AM
> *To:* discussion at sipforum.org
> *Subject:* Re: [SIPForum-discussion] From field in SIP header
>
>
>
> Hi,
>
>
> I guess your firewall is behaving correctly... if you are not recieving
> RTP check the SDP being exchanged.
>
>
>
> Regards
>
>
>
> Rohin
>
>
>
>
> On 30/11/2007, *Fredrik Sandedal* <fredrik.sandedal at enera.se> 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 192.168.1.33to 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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>
> --
> "if you don't know where you are going,
> what difference does it make,which path you take"
> ---Cheshire Cat
>



-- 
"if you don't know where you are going,
what difference does it make,which path you take"
---Cheshire Cat
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