[asterisk-users] [IAX] Up-to-date list of soft- and hardphones?

[Dave Fullerton]

Cavalera Claudio Luigi wrote:
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com 
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
>> Gordon Henderson
>>
>> However, you'll need to do similar things to your asterisk 
>> box & router if 
>> it's behind NAT for IAX as you do for SIP. (You will need a static IP 
>> address on the NAT router and port-forward 4569 to the 
>> asterisk box, just 
>> as you'd port-forward 5060 and 10000-20000 for SIP)
> 
> Please correct me if I'm wrong, for Iax clients you don't need to do
> static port-forwarding as they will create upon registration one entry
> in NAT table with UDP port for both signalling and media. On the other
> hand, sip clients (without Stun) are difficult to manage behind Nat
> because of RTP/RTCP ports.
> I don't want to start a flame Iax vs Sip, just to clarify respective
> advantages.
> 
> Best Regards,
> Claudio

I believe you are correct, as long as the client sends *something* to 
the server at frequent enough intervals that the router keeps the 
connection in it's active list.

-Dave