[Asterisk-Users] sip-msmessenger

[Girish Gopinath]

Hello,

>From: Shawn <sepling at tampabay.rr.com>
>Reply-To: asterisk-users at lists.digium.com
>Subject: [Asterisk-Users] sip-msmessenger
>Date: 31 Mar 2004 17:03:08 -0500
<snip>
>Transmitting (no NAT):
>SIP/2.0 407 Proxy Authentication Required
>Via: SIP/2.0/UDP 192.168.1.100:9082
>From: <sip:2203 at 192.168.1.101>;tag=97442d5b-75b7-4e23-9021-b8605797eb56
>To: <sip:2203 at 192.168.1.101>;tag=as38587f8c
>Call-ID: ea352d6f-a879-4db6-a361-365487a20d4a at 192.168.1.100
>CSeq: 1 REGISTER
>User-Agent: Asterisk PBX
>Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
>Contact: <sip:2203 at 192.168.1.101>
>Proxy-Authenticate: Digest realm="asterisk", nonce="26e59066"
>Content-Length: 0

Just guessing here... Check your secret, host fields of the sip user entry 
in sip.conf.
Or try removing the secret field and change host= field to host=dynamic. 
HTH...

Regards, Girish

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