You can try replacing the save("location") with the below lines, if( method==REGISTER) { ......... // should be within the authorised condition ... if( uri=~"sip:[.]*@eniac.alien.bt.co.uk" ) { save("location"); rewritehost("132.146.196.91"); save("location"); } else save("location"); break; }; You may also need a line diversion of call, ( Not sure, but you can check without the following ) if( uri=~"sip:[.]*@132.146.196.91" ) { rewritehost("eniac.alien.bt.co.uk"); forward(uri:host,uri:post); } ----- Original Message ----- From: <dhiraj.2.bhuyan(a)bt.com> To: <serusers(a)lists.iptel.org> Sent: Tuesday, December 02, 2003 10:50 AM Subject: RE: [Serusers] SIP URL with IP Address Problem Sorry I attached the wrong config file in my previous email. Correct one attached - Regards, Dhiraj -----Original Message----- From: dhiraj.2.bhuyan(a)bt.com [mailto:dhiraj.2.bhuyan@bt.com] Sent: 02 December 2003 10:48 To: serusers(a)lists.iptel.org Subject: [Serusers] SIP URL with IP Address Problem Hello everyone, I am facing the following problem - eniac.alien.bt.co.uk = 132.146.196.91 A Grandstream BudgeTone 100 phone is registered to the SER registrar and proxy running on eniac.alien.bt.co.uk as dhiraj(a)eniac.alien.bt.co.uk When I try serctl ping sip:dhiraj@eniac.alien.bt.co.uk I get back a "200 OK" But when I do serctl ping sip:dhiraj@132.146.196.91 I get back a "404". How to overcome this? I am using SER from the CVS. My ser.cfg is attached. Thanks, Dhiraj Bhuyan Network Security Specialist, BT Exact Tel: +44 1473 643932 Mob: +44 7962 012145 Email: dhiraj.2.bhuyan(a)bt.com ---------------------------------------------------------------------------- ----