SIP error 401 on call from CUBE to CUCM

[Paul Austin]

Hi Folks, Integrating a CUBE with CUCM V12.0 and I have outgoing calls OK but incoming calls fail. When I do a "debug ccsip messages" I can see that I am receiving a 401 error message from CUCM back to the CUBE thus. Any ideas as its driving me crazy. I thought the authorization was between the CUBE and ITSP not back to the CUCM. CUCM doesn't even ask for any authentication credentials.

1163167: Oct 13 12:43:56.582: //4646986/35F5A25BAD70/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 172.18.96.100:5060;branch=z9hG4bKD0C1FF4
From: <sip:+12345678910@172.18.96.100>;tag=455B1FC5-1099
To: <sip:+09876543211@172.18.96.61>;tag=1424739835
Date: Tue, 13 Oct 2020 10:02:06 GMT
Call-ID: 35F8AFBC-C8011EB-AD76F7E1-5FB58DC1@172.18.96.100
CSeq: 101 INVITE
Allow-Events: presence
Server: Cisco-CUCM12.0
WWW-Authenticate: Digest realm="StandAloneCluster", nonce="EadwbDYHTSzxpX4iMUj/otBZVpT7jYqm", algorithm=MD5
Content-Length: 0

[Mohammed al Baqari]

Share full debugs for incoming call on the cube to see what is received
from itsp and what is passed to cucm.

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[Paul Austin]

OK here you go. Thanks.

[TONY SMITH]

Check the SIP Trunk configuration and the SIP Trunk Security Profile in CUCM.  It looks like it's expecting authentication.

[Mohammed al Baqari]

Your SIP trunk on CUCM is configured with a security profile to perform sip
digest authentication and your CUBE isn't configured to authenticate with
CUCM. Its giving an error "Error getting credentials". If you want to use
authentication with cucm, configure authentication on CUBE for calls to
CUCM. Otherwise, change your sip trunk security profile to disable digest
authentication.

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[Paul Austin]

Yeah thats what I thought as well but there is nothing selected in the sip trunk security profile.

[Roger Kallberg]

As that is a required setting on a SIP trunk I would say that you're likely not looking at the right place.

The highlighted part is what you need to check.