Kurt Dethier wrote:
> Marwan Sultan wrote:
>> Hello All,
>>  Well, maybe the subject says all,
>>  Im running 6.1R acting as NAT, gateway ofcourse, hotspot.
>>  I have many clients trying to use Vonage, motorola, VoIP devices and
>>  and few more products.
>>  The problem is as its described in some websites..
>>  They can call, receive a call, hear the dailtone but no one can hear
>> the other party.
>>   After researching i found out there is a problem iusing FreeBSD NAT
>> with voip protocols.
>>   i have been advised to use STUN servers, (Simple Traversal of UDP
>> through NATs.)
>>   I found out there is net/stund port and its installed successufly!
>>   but still lost.
>>   Can someone kindly and please shade a light on howto
>>   make voip behind NAT works in my FreeBSD ? im in trouble because of
>> this.
> Hi Marwan,
> STUN will only work if you have the correct NAT implementation on
> your gateway. If you are using pf, you get what the STUN RFC calls
> a symmetric NAT. STUN will not help you in such an implementation.
> I'm not sure how the other NAT solutions on FreeBSD are implemented.
> If you need a solution for a symmetric NAT, you need something that
> understands the signaling protocol and can add fw/nat rules on demand
> on your gateway, or a media proxy (like TURN).
> Kurt

It is entirely possible to use voip behnd symmetric nat, but it also
entirely depends on the setup, some more details will help.

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