VoIP behind NAT and FreeBSD
youshi10 at u.washington.edu
Sat Dec 2 13:34:02 PST 2006
Kurt Dethier wrote:
> Derrick Edwards wrote:
>> On Saturday 02 December 2006 09:22, Joe Holden wrote:
>>> Kurt Dethier wrote:
>>>> 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).
>>> It is entirely possible to use voip behnd symmetric nat, but it also
>>> entirely depends on the setup, some more details will help.
>> Hi, I am not sure of your setup either, but I have Vongae working
>> behind a FreeBSD Firewall/Router using PF with NAT.
> Hi all,
> It is very possible to use VOIP behind a symmetric NAT, but STUN is not
> going to be any help. Depending on the setup and clients I have
> implemented a number of solutions over the past years.
> Unfortunately I haven't found a single solutions that always works.
Forgive me if I'm not understanding the issue properly, but don't you
have port-forwarding setup on the FreeBSD box for the machine that you
are trying to use VoIP with? It seems like the problem would *sort* or
be that simple to solve, unless the VoIP setup uses a P2P type
configuration where it picks multiple ports for listening and
Maybe it's just my misunderstanding of VoIP..
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