[Serusers] Problem with REGISTER

[Santosh Subramanian, Noida]

could you please tell me why the following REGISTER request is not getting
401 response..? 
I am struggling with this problem for the past two days. Kindly update me.
 
REGISTER sip:iptel.org:5060 SIP/2.0  ( if I change sip:iptel.org as
sip:195.37.77.101, I am getting 403 response from iptel.org)
Via: SIP/2.0/UDP 192.168.14.200:5060;branch=z9hG4bK1436934251
From: san <sip:san at iptel.org>;tag=501424250
To: san <sip:san at iptel.org>
Call-ID: 323191517 at 192.168.14.200 <mailto:323191517 at 192.168.14.200> 
CSeq: 1 REGISTER
Contact: san <sip:san at 192.168.14.200:5060>
max-forwards: 50
user-agent: oSIP-ua/0.8.1
expires: 3600
Content-Length: 0
 
 
Thankyou
Santhosh.S
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20031220/82596f28/attachment.htm>