[Asterisk-Users] IAX2 + port translation

[Robert Webb]

Dr. Michael J. Chudobiak wrote:
> Hi all,
>
> I'm having trouble with incoming IAX2 calls on 1.2.7.1 - mostly they 
> work, but sometimes the caller just gets dead air or disconnects. IAX2 
> debugs show HANGUP and INVALID codes in these cases, rather than a 
> proper RINGING transaction.
>
> My firewall is doing NAT, and changing the source port from 4569 to 
> something else - my IAX2 provider suggested this might be a problem. 
> Is it? Should this work:
>
> steerpike*CLI> iax2 show registry
> Host                  Username    Perceived             Refresh  State
> 64.26.157.230:4569    8886708729  64.26.155.62:14353         60  Reg
> 64.26.157.230:4569    6134827945  64.26.155.62:14353         60  Reg
> 64.26.157.230:4569    6136866597  64.26.155.62:14353         60  Reg
> 64.26.157.230:4569    6136866675  64.26.155.62:14353         60  Reg
>
> There are four DIDs, and all are registered to an odd port (14353). Is 
> this OK? (I am using a Sonicwall TZ170 with "Enable Consistent NAT" on).
>
>
> - Mike


If memory serves me properly what you are showing looks correct. You 
server is registering to your provider on port 4569 as it should. Their 
server is seeing you register from 64.26.155.62 and using the prt 14353 
which is the port that your firewall has given that outgoing connection.

Possibly that the firewall is removing that connection port after some 
time and your provider cannot get back to your box? Try setting the 
reregistration time lower than 60 and see if it helps.