[reSIProcate] SUBSCRIBE to LCS failing

[Chris Rigg]

Hey Resip folks,

I'm wondering if one of you SIP gurus out there can tell me what's wrong 
with my SUBSCRIBE that I'm sending (from my resip app) to an LCS Access 
Proxy (configured for Federation mode). LCS is complaining about my 
Contact field and I have NO idea why. Hopefully the answer will be 
obvious to one of you folks out there.

Here is the SUBSCRIBE I'm sending:

SUBSCRIBE sip:naim at lcs-im.com;transport=TLS SIP/2.0
To: <sip:naim at lcs-im.com>
From: "Chris" <sip:cdrigg at sip.com>;tag=1928301774;epid=1234567890
Via: SIP/2.0/TLS 10.94.150.51:5061;branch=z9hG4bKnashds8;rport
Call-ID: a84b4c76e66710
CSeq: 1 SUBSCRIBE
Contact: 
<sip:cdrigg at sip.com:5061;transport=TLS;maddr=bldr-ccm51.sip.com;epid=1234567890>
Max-Forwards: 70
Accept: application/pidf+xml
User-Agent: SIPimp.org/0.2.5 (curses)
Event: presence
Content-Length: 0

Here is the Error response I receive back from the LCS Access Proxy:

SIP/2.0 400 Invalid Contact information
Via: SIP/2.0/TLS 
10.94.150.51:5061;branch=z9hG4bKnashds8;rport;received=10.94.150.51;ms-received-port=53629;ms-received-cid=100
From: "Chris" <sip:cdrigg at sip.com>;tag=1928301774;epid=1234567890
To: <sip:naim at lcs-im.com>;tag=6874DB54FE540E7746B0FA5A3878A44F
Call-ID: a84b4c76e66710
CSeq: 1 SUBSCRIBE
Content-Length: 0

In the error logs on the LCS AP, I see the following:

    exit. trying to provide a contact host different from the source of 
the request.
    exit. failed to process contact entry. Returned 
C3ED180F(SIPPROXY_E_CONTACT_NOT_AUTHORIZED)

Not sure what it means by "different from the source of the request". I 
assume it's complaining about my maddr field but I don't know why. I can 
ping that exact maddr FQDN from the AP so I don't know what the problem 
is. Here is a SUBSCRIBE that LCS sends to me (for comparison)...

SUBSCRIBE sip:naim at lcs-im.com SIP/2.0
Contact: 
<sip:cdrigg at lcs-im2.com:5060;transport=tls;maddr=bldr-ccm4.lcs-im2.com;epid=a77cce963d>
Via: SIP/2.0/TLS 
10.94.150.104:1566;branch=z9hG4bK8C1EC119.2BD55AAA;branched=FALSE;ms-internal-info="dasUZ47s2g9aGGVkRjBLk5UoyXXaMA"
Max-Forwards: 68
ms-asserted-verification-level: ms-source-verified-user=verified
Via: SIP/2.0/TLS 
10.94.150.90:2350;branch=z9hG4bKEFC20B43.887A39B8;branched=FALSE;ms-received-port=2350;ms-received-cid=13f00
Via: SIP/2.0/TLS 
10.94.150.90:2501;ms-received-port=2501;ms-received-cid=e300
From: "Chris" <sip:cdrigg at lcs-im2.com>;tag=e9120583b8;epid=a77cce963d
To: <sip:naim at lcs-im.com>
Call-ID: d24ea4e1799d4788ac146d7cdfe90d6a
CSeq: 1 SUBSCRIBE
User-Agent: LCC/1.3
Event: presence
Accept: application/xpidf+xml, text/xml+msrtc.pidf, application/pidf+xml
Supported: com.microsoft.au


Any ideas??

Thanks,
Chris