[Asterisk-Users] Broken DNS makes Asterisk whacky!

[Matt Lawson]

Check this out.  I recently closed a bug I had written, #495 
"ExtraChannel in transfer causes crash"  Now I've been able to reproduce 
it, and somewhat narrowed down the culprit.  But before I write another 
bug report, I wanted to see if anyone else had experienced the following 
(or would like to try:)

When DNS (or outside connection to the network, not sure which) is 
broken and you have "register=>" lines in iax.conf, Asterisk gets whacky.

First of course you'll the message "Host (whatever) not found at line 
(whatever)" in iax2.c at startup.  It takes a long time for the lookup 
to timeout.

Later, I get some other generally bizzare behavior including:
    1. I get "everyone is busy at this time" from devices that aren't.
    2. The dual-redirect crash is 100% repeatable now.  One of the last 
things you see is "planning to masqerade 0sd8(*&(& INTO ...." just 
before it crashes.

If you remove the "register" lines from iax.conf (or fix your 
DNS/Internet problem) it runs fine.

My first thought is it could be a timing issue due to the timeout taking 
so long during startup.  Looking at the IAX2 registration code, it 
doesn't immediately appear that a failed registration would wreak any 
particular havoc.

Does this sound similar to anyone else's experience?  Anyone else care 
to verfiy?  Our Asterisk version is pretty close to CVS, maybe a few 
weeks out but I didn't see any bugs listed that seemed to address this.