[Serusers] cisco 7905G

[Marcello Lupo]

Hi,
the problem is that Cisco 7905G do not support STUN servers so it is not 
able to know on which port the request is sent out after NAT. It is a stupid 
SIP phone, in my opinion, to be used as SIP phone behind nat. Eventually you 
need a router that make symmetric nat so the 5060 internal port will be 
translated as 5060 out port but you will need in any case to open ports for 
RTP and 5060 fr incoming calls.
Bye,
Marcello

----- Original Message ----- 
From: "Alberto" <alberto.ipt at telefonica.net>
To: <serusers at lists.iptel.org>
Sent: Tuesday, September 27, 2005 11:00 AM
Subject: [Serusers] cisco 7905G


> Hi,
> I have the next scheme:
>
>    7905G ------- NAT ------- Internet ------ SER+mediaproxy
>
> When the 7905G sends a INVITE the ser responds:
>   Status: 407 Proxy Authentication Required.
>
> This is right, but the destination port this packet not is right because 
> the ser sends the packet with
> destination port 5060  (private port) and not the (public port). If I open 
> this port all it is right, I do not
> want to open no port.
>
> This single problem happens to me with 7905G (no linksys, no X-Ten, ...).
>
> I do not understand what it is happening.
>
> Thanks for your aid.
>
> --
> Alberto
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