SSRS Report Server with Forms Auth Not Working on a Port other than 80

We setup a custom implementation of an SSRS report server to use forms authentication. Can we use a port other than 80? We are getting 开发者_如何学Python401 unauthorized when we do use another port other than port 80.

Any ideas?

Thanks.

maybe you have a firewall that blocks the other ports.

Since this is 2005 it sounds more like an IIS problem than SSRS, you might post over at Serverfault as well.