[asterisk-users] How to stop intruder from registering sip?

[Ira]

At 01:06 PM 6/13/2010, you wrote:
>We use a combo of aastra 9133i and 57i's. Don't the user id and the
>extension HAVE to be the same? I had thought the aastra's used the
>extension as the SIP id to register.

So in your extensions.conf you need lines like:

exten => 123,1,dial(SIP/123_thisisAfunnyextension)

Well, that should give you the idea. Don't know if it's the best way, 
but it's worked for me.

Ira