Trying to connect to a site from behind my nw6, bm38 server. The site
comes up fine, however my user cannot sign in to get his own content.

Site is . when you click on the signin button
(upper right), the following happens:

Firefox: login box pops up, when userid & pwd entered & hit enter,
process repeats.

IE: Error
Access denied. You do not have permission to perform this action or
access this resource.
Access requests are not enabled.

App seems to be Windows SharePoint Services.

All works ok when brdmgr is bypassed.