[resolved] 1.4.0 IAX demo failure

When I try 500@demo, i.e., IAX call to misery.digium.com, it always gives auto_congest.

[quote] – Executing [500@default:2] Dial(“Zap/1-1”, “IAX2/guest@misery.digium.com/s@default”) in new stack
– Called guest@misery.digium.com/s@default
[Jan 29 21:43:15] NOTICE[1957]: chan_iax2.c:2686 __auto_congest: Auto-congesting call due to slow response
– IAX2/ is circuit-busy
– Hungup ‘IAX2/’

Asterisk 1.4.0 on Linux 2.4.18-19.7.x, sample configs. When I use 1.2.13 (Linux 2.6.15-27-386) for same test using sample configs, the IAX call goes through.

Is this a bug?

Time to take my own medicine :smiley: Just permitted IAX port (4569) in ipchains (RedHat, host firewall on by default) and the 500 demo works like on the 1.2 system (Ubuntu, host firewall off by default). Not related to Asterisk version (or Linux version) at all.

Funny that I had had to poke holes in ipchains when I configured SIP/RTP, but totally forgot this point when it came to IAX. :blush: So also thank dinkster for the question.