If you are new to hosting Unreal engined servers, please check out www.unrealadmin.org. Most information there is applicable to running an Ostfront server. Note, the ports are different for Ostfront servers as mentioned in this thread:
http://www.redorchestragame.com/forum/showthread.php?t=2830
And the HLDS update command for RO servers is in this thread:
http://www.redorchestragame.com/forum/showthread.php?t=2831
http://www.redorchestragame.com/forum/showthread.php?t=2830
And the HLDS update command for RO servers is in this thread:
http://www.redorchestragame.com/forum/showthread.php?t=2831