Nothing should hinder you from using STUN with sipX. If the STUN client guessed the port bindings correctly, there shouldn't be any difference whether it's NATed or not. However, the problem arises when the STUN client guessed wrong and you expect sipX to compensate for it.

On Friday, 01 October, 2010 02:06 AM, Michael Scheidell wrote:
I know that all the sipx remote worker FAQ's and docs say "don't use an stun server, turn it off, click it out". but for some of us that just seem to run into all kinds of nat transversal issues at the FAR end (where we don't have as much control: wifi at starbucks, hotel, airport), some 3G providers.. some cable providers who send you THEIR firewall..) has anyone actually TRIED it and made it work?

and, why wouldn't it work? every other sip pbx INSISTS you use stun servers?

<http://sipx-wiki.calivia.com/index.php/STUN>

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