No more http Portal Access

Hmm, interesting one. Here are a couple of things you could try;

• Have you got any ACL's in the traffic path that it may match? Seen that you get a firewall log for the HTTPS version, you may have one for the HTTP version as well, but without the logging?
• Are you using the AD configuration for anything else than authentication? E.g. maybe using group memberships for assigning ACL's? When you changed something, this may accidentally have stopped working.
• When you log in, check in the session variables list if you get all the information from AD that you would expect to see and that any objects get assigned that you expect to be assigned (such as ACL's)
• From the F5 CLI, you can test the communication to the backend server (using "curl http://xxxx") to confirm that is still working (or not)

Hope this helps.