Ok- I have OWA working fine for a long time using FBA. It is published via ISA 2004 and works internally as well as externally. This was set up using the recommended method (web publishing rule with a listener configured to use FBA). The listener is configured to use a wildcard cert that is installed on the ISA as well as the Exchange 2003 server. No problem.
I recently installed a new Exchange 2003 server and now have two. I installed the same wildcard cert on it and FBA is enabled. I can access OWA using FBA on the new box just fine internally. I copied the old OWA publishing rule and changed the public name and the internal server appropriately. (the public name resolves to same IP address of OWA-FBA listener). It is setup identical to the original. From an external browser- When I type https://oldserver.domain.com/exchange
and supply a new user I am redirected to https://newserver.domian.com/exchange
just like expected.
What I get is at this point is:
Error Code 10061: Connection refused
Background: When the gateway or proxy server contacted the upstream (Web) server, the connection was refused. This usually results from trying to connect to a service that is inactive on the upstream server.
It is very likely that I missed something obvious but I am stumped...