Epic Games has released dedicated servers to run Unreal Tournament 2003 on Win32 and Linux. These files allow anyone to run a dedicated UT2003 server, even if they do not own a retail copy of UT2003. Once installed, it will occupy around 780MB of disk space, significantly smaller than the 2.4GB required for a retail installation. Server admins wanting to advertise their server to the official master server list, and be included in UT2003 stats will require a dedicated server key. Go to this page to generate a dedicated server key.