[Asterisk-Users] IAX2 'no authority found' problem

[Simon Ward]

Hi everyone,
I'm having some problem trying to set up an IAX connection between two * 
servers.
The scenario is :
serverA has an X100p card and will direct all calls from the X100p over 
IAX to a specific extension on serverB which is at the other end of an 
unfirewalled VPN connection.

At the moment serverA tries to redirect the call to serverB but recieves 
this message (it appears on both servers) :

-- Executing Dial("Zap/1-1", "IAX2/test:test at 192.168.1.250/cardiff") in 
new stack
     -- Called test:test at 192.168.1.250/cardiff
Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
    Timestamp: 00006ms  SCall: 00001  DCall: 00000 [192.168.1.250:4569]
    VERSION         : 2
    CALLED NUMBER   : cardiff
    LANGUAGE        : en
    USERNAME        : test
    FORMAT          : 2
    CAPABILITY      : 65283
    ADSICPE         : 2
    DATE TIME       : 151287361

Rx-Frame Retry[No] -- OSeqno: 000 ISeqno: 001 Type: IAX     Subclass: REJECT
    Timestamp: 00001ms  SCall: 00001  DCall: 00001 [192.168.1.250:4569]
    CAUSE           : No authority found

Aug  4 14:50:02 WARNING[147465]: chan_iax2.c:5339 socket_read: Call rejected
by 192.168.1.250: No authority found
Tx-Frame Retry[-01] -- OSeqno: 001 ISeqno: 001 Type: IAX     Subclass: ACK
    Timestamp: 00001ms  SCall: 00001  DCall: 00001 [192.168.1.250:4569]
     -- Hungup 'IAX2/192.168.1.250:4569/1'
   == No one is available to answer at this time

Here are excerpts from the config files :

ServerA:

extensions.conf
[incoming]
exten => s,1,Dial(IAX2/test:test at 192.168.1.250/cardiff)

ServerB:

iax.conf
[cardiff]
type=friend
username=test
secret=test
context=sipfonescard

extensions.conf
[sipfonescard]
exten => cardiff,1,Dial(SIP/1101)

Has anyone got any suggestions on what might be the solution to the 'no 
authority found' problem, I'm convinced that it must be something pretty 
simple that I'm missing but I can't find any tips to point me in the 
right direction.

Any suggestions would be appreciated,

Thanks,
Simon Ward