[Asterisk-Users] IAX quesitons please.

[info]

Hello,everyone,      I encoutered some difficult with IAX when I run the asterisk.   <---->internet <--> asterisk + NAT <--> DIAX   my * box and NAT are at the same linux box which connecting to the internet using ADSL. The box has two network cards and two IP address,such as   public IP:211.11.11.11 private IP:192.168.1.10   the windows box running DIAX lies behind the NAT,it's IP is 192.168.1.12   the iax.conf like this:   ......   [marko] type=friend host=dynamic username=marko secret=moofoo context=fromsip auth=plaintext   ......   the extensions.conf like this:   ..... exten => 45678,1,Dial(IAX2/marko) .....   Question1: I use the DIAX register to the *, if I set the server IP in the DIAX to 192.168.1.10,then it will OK, but if I set the server IP in the DIAX to 211.11.11.11, then I will fail to register. I have tried all version of DIAX and alway got the same result. Why?   Question2: If I dial the IAX2 user registed to my * inside my NAT,it will success,but if I dial other IAX2 user registed to my * in the internet (not inside my NAT),I alway get the result:     == Everyone is busy at this time   Any help will be apprecated. Sorry for my poot English.   Regards.                                 franc