[Asterisk-Users] Newbie Issues => SIP won't stay connected, and IAX Unable to Create Channel

[Olle E. Johansson]

Robert Jackson wrote:
> I am terribly sorry to bother the list with such generic and bizarre
> problems, but I have been racking my brain with these for the last week
> working on it for at least 60 hours.  
No need for excuse, we're here to help. You've obviously spent time looking
for an answer...

   All iptables default rules are set allow
> and no other rules are entered.  The whole setup is a proof of concept

Without knowing much about iptables I would say that the "default rules"
sounds like a good candidate for further inspection. Can you disable
iptables and test without it?

Sounds like the iptable fw needs traffic from the inside (ping) to allow
anything from the outside. So client's can't register unless the server
spoke to them first. And there seems to be a timeout as well on this
"session" in your iptables setup. Why an ICMP ping opens up for UDP
is a mystery...

I'm on very thin ice here, so treat this as a friendly guess from my side.
I've seen a few similar mails, but no solution so we need to come up
with a problem description and a solution for the FAQ.

Good luck! And please tell us what it was that caused the problem when
you've solved it.

/Olle