My SIP provider is not happy that credentials (in the Authorization header
field) are provided in the initial REGISTER request.

The SIP provider ONLY wants the credentials AFTER rejecting the message with
a 401.

I know it's dumb, because the RFC says that the the initial REGISTER message
MAY include credentials.  If it fails, the proper authentication method is
included in the 401.  I know there is nothing wrong, it is how SIP is
supposed to work.

However I would like to keep my SIP provider from complaining.  Asterisk is
"NOT SUPPORTED" by the SIP provider.

Does anyone in the Asterisk community know how to avoid sending the
credentials until AFTER receiving a 401?

Any suggestions would be appreciated!


Sincerely,
Brian LaVallee

  
# ===========================
# sip.conf
# Asterisk 1.8.15-cert1
# ---------------------------
; 
[general]
;
; - trucated
; 
register=>[email protected]:secret:[email protected]/
DID
;
; - end

# ===========================
# SIP REGISTER Dialog
# ---------------------------

IP 4.4.4.4.sip > 8.8.8.8.sip: UDP, length 602
............................REGISTER sip:server.carrier.tld SIP/2.0
Via: SIP/2.0/UDP 4.4.4.4:5060;branch=aAaAaAaAaAaAaAa
Max-Forwards: 70
From: <sip:[email protected]>;tag=as6c2d23d4
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 190 REGISTER
Authorization: Digest username="account", realm="carrier.tld",
algorithm=MD5, uri="sip:sip:8.8.8.8", nonce="1368595443265327",
response="0b833bff6d83337f9f88f6fb53bbcef6"
Expires: 1800
Contact: <sip:[email protected]:5060>
Content-Length: 0


IP 8.8.8.8.sip > 4.4.4.4.sip: UDP, length 469
............................SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 4.4.4.4:5060;branch=aAaAaAaAaAaAaAa
From: <sip:[email protected]>;tag=as6c2d23d4
To: <sip:[email protected]>;tag=3577586129
Call-ID: [email protected]
CSeq: 190 REGISTER
Content-Length: 0
Date: Wed, 15 May 2013 05:55:29 GMT
WWW-Authenticate: Digest realm="carrier.tld", domain="sip:8.8.8.8",
nonce="1368597329273572", opaque="", stale=TRUE, algorithm=MD5


IP 4.4.4.4.sip > 8.8.8.8.sip: UDP, length 602
............................REGISTER sip:server.carrier.tld SIP/2.0
Via: SIP/2.0/UDP 4.4.4.4:5060;branch=BbBbBbBbBbBbBbB
Max-Forwards: 70
From: <sip:[email protected]>;tag=as333ffab1
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 191 REGISTER
Authorization: Digest username="account", realm="carrier.tld",
algorithm=MD5, uri="sip:sip:8.8.8.8", nonce="1368597329273572",
response="097ee5b915cd39c1407c785fb3c06caf"
Expires: 1800
Contact: <sip:[email protected]:5060>
Content-Length: 0


IP 8.8.8.8.sip > 4.4.4.4.sip: UDP, length 373
............................SIP/2.0 200 OK
Via: SIP/2.0/UDP 4.4.4.4:5060;branch=BbBbBbBbBbBbBbB
From: <sip:[email protected]>;tag=as333ffab1
To: <sip:[email protected]>
Call-ID: [email protected]
CSeq: 191 REGISTER
Contact: <sip:[email protected]:5060>;q=0;expires=1901
Content-Length: 0
Date: Wed, 15 May 2013 05:55:29 GMT

# ===========================





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