[Serusers] Call Rerstriction & Security !

[Kannaiyan Natesan]

I have used,

if (search("(f|From): .*@mydomain.com)) {
    if (!(proxy_authorize("mydomain.com" /* realm */,"subscriber" /* table
name */ ))) {
           proxy_challenge("mydomain.com /* ream */, "1" /* use qop */ );
           break;
    }
}

to restrict calls only from my domain and authenticated. But When I use
http://www.iptel.org/aa/  It could bridge the call between two domains.
Where is the problem? Is my approach correct? and please help how can I do
the same?

Best Regards,
Kannaiyan