[cisco-voip] Authenticating sip trunk to ITSP from CUBE?

[Nick Barnett]

I've never dealt with an authenticated SIP trunk before and I'm having some
issues. I was wondering if anyone has had a similar experience. I already
have 2 SIP trunks from ITSP-1 that do NOT require authentication. These are
working fine and have been for years.

We are adding ITSP-2 and their SIP service DOES require auth.  I've
followed their integration guide (which left a lot to be desired) and their
acceptance team is telling me my auth is coming from our private class A
address.

Our CUBE is in HA with an inside (10.x.x.x) and outside (public) IP
address. They are seeing REGISTER messages sourcing the inside VIP.

I was looking around for an auth BIND statement or something like that, but
I haven't had any luck. Any pointers?

Thanks,
Nick
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