If you get an EventID 14148 on your ISA Server (2K4 in this case) and it’s running on an IBM Server, chances are the IBM ServeRAID software has stolen port 8080 for it’s own use. Specifically Miniwinagent will be using it. The docs on IBM’s site say it’s not critical to the ServerRAID management software and only used for firmware updates. If you want port 8080 back you can either uninstall and reinstall without the feature, or just disable the Service.
“The Web Proxy filter failed to bind its socket to x.x.x.x port 8080. This may have been caused by another service that is already using the same port or by a network adapter that is not functional. To resolve this issue, restart the Microsoft Firewall service. The error code specified in the data area of the event properties indicates the cause of the failure.”