401 Unauthorize or 407 Proxy Authentications are not errors it is as per SIP standards. You have enabled authentication so each packet is challenged to come back with credentials MD5.

I would suggest you to read a bit about Authentication 401 & 407

On Mon, Nov 4, 2013 at 2:57 PM, Owais ul Haq <owaisulhaq@hotmail.com> wrote:

Hello,

I am using kamailio server. Problem is when my soft phone tries to connect to Kamailio server, it connects in second attempt. First it gets a sip reply saying "Status : 401 Unauthorized (0 bindings)". I checked this using Wire Shark. Can some one please help me in finding the reason for this error message found all the time.
Thanks

Best Regards

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Regards

M. Salman Zafar

VoIP Professional