I would think that you could just check the REFERER envorinment variable. Add code near the beginning of ULTIMATEBB.CGI before all the "if ($ubb eq 'whatever')" lines of code that checks the REFERER and if it's not from your server, redirect to a page of your choosing. Shouldn't be too hard at all.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.
