asterisk users - Jul 2006 - SIP user deny and permit for calls through Asterisk

Hi,

i tried deny and permit in the peer definition.

It works fine for registration purpose.

But if the peer is dialing through Asterisk these settings are ignored. Only 
username and password are used for authentification.

Is there anythink additional what I can use to prevent that the phone is 
making calls from another IP.

I tried also host=IP and defaulip, but it did not help when the phone is 
placing calls through Asterisk.


thanks

Thomas