Use iChatAV with Speedtouch 510 ADSL modems

Oct 21, '04 11:11:00AM

Contributed by: patrekur

It seems the 510 modem has standard NAT bindings for some protocols. The SIP protocol is bound to port 5060. Because of this, iChatAV cannot connect with audio/video, and you get either a timeout or connection failure. Examining the "connection doctor" log reveals it uses a private network IP number to connect. Obviously, this will not work.

The solution is simply to telnet to the ADSL modem and remove this binding:

telnet 10.0.0.138
Trying 10.0.0.138...
Connected to speedtouch
Escape character is '^]'.
Username : root
Password : ********
----------...
... welcome message trimmed
...
Unbind the SIP protocol and reboot the modem:
=>nat unbind application=SIP port=5060
=>config save
=>system reboot
To check whether the SIP protocol is bound in your modem use this command to show the list of bindings (only showing SIP here):
=>nat bindlist
Application  Proto Port
SIP          udp   5060
Now ichatAV should have no trouble connecting with audio and video!

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