We're using some third party software which runs as a service on one computer, accessing an IIS resource on second computer. The second computer isn't in the same domain as the first, and there's a firewall directly between them.
Both servers are Windows 2003, running IIS6.
The service fails to do what it wants because it isn't authorised to access the IIS resource (HTTP error 401). The resource cannot be run anonymously (and complains if I set IIS to work like that) and uses windows authentication. The software assumes that both machines are in the same domain.
Without adding the second computer to the same domain as the first (which must be possible, but involves fiddling around with routing), can I make it so that the service can access the resource?
I've tried to find ways of adding the first computer as an authorised user on the second one, but I can't.