I am trying to decipher a kamailio.cfg file for a particular open source project.
There are problems with authentication and I am trying to understand why.
They use the following lines for authentication check
if (!auth_check("$fd", "subscriber", "0")) { auth_challenge("$fd", "0"); exit;
The documentation only talks about using "1" and not "0". So I am trying to understand what the above statement with "0" is actually doing. Any help in this regard would be greatly appreciated.