Environment:

I have a workstation on our primary domain. We have a primary WSUS Server that is the upstream server of 8 different testing domains. The Primary WSUS server is not part of any domain. Routing is configured between my workstation and the Primary WSUS server. I can RDP to the Primary WSUS sever without any problem. The router is configured to forward any any between my workstation and the Primary WSUS server. This WSUS server cannot be part of a domain due to external requirements (I can't change them) on the lab I work in. The version of WSUS is WSUS 3.0 SP 2

What I want to do:

I need to connect to the WSUS server with the WSUS Admin console from my local workstation. The end goal is to connect via Powershell and manage with that. I also need to take what I do here and port it to the 8 test domains so I can manage those WSUS servers. The routing is all in place so I can talk to the servers, it's just connecting to the WSUS console that is causing problems.

The problem:

I cannot get my workstation to connect to the WSUS Console.

I get one of the following errors depending on the setup.

1st error:

Cannot connect to 'WSUS'. You do not have the permissions required to access this WSUS server.
To connect to the server you must be a member of the WSUS Administrators or WSUS Reporters security groups

I also get the warning 7012 from the event log that says the same thing.

2nd error:

Cannot connect to 'WSUS'. The server may be using another port or different Secure Sockets Layer setting.

What I have tried:

So far I have configured IIS for Anonymous Authentication on both the WSUS Administration and ApiRemoting30 using an account will call WSUS_User. With this in place, I get the 1st error. When I do this though, the local WSUS Console cannot be used either.

Reverting back to only Windows Authentication allows the local console to work, but the remote console now give the 2nd error.

I have confirmed the port, and that there is no SSL in use (which is a policy that is pushed from above, that I cannot effect).

I have placed WSUS_User in the groups mentioned above, but it still does not connect.
I made sure WSUS_User has full access on C:\Program Files\Update Services and C:\Program Files\Update Services\WebServices

I am not very familiar with the workings of WSUS or IIS, and have gone as far as I can figure out on my own. Googling these errors all take me to the same steps about Anonymous Authentication and configuring permissions on folders.

Note:

I have cross-posted this to StackOverflow as well.