The following is a list of ports that Red Orchestra: Ostfront uses. If you expereince problems with RO trying to access the news server of the master server or even connecting to a server, please make sure these ports are not blocked.
7757 UDP/IP (Game Port)
7758 UDP/IP (Query Port)
7767 UDP/IP (GameSpy Query Port)
28902 TCP/IP and UDP (Allows your Server to Connect to the Master Server Browser)
8075 TCP/IP (Port set via ListenPort that your WebAdmin will run on)
20610 UDP/IP (Steam Port)
7757 UDP/IP (Game Port)
7758 UDP/IP (Query Port)
7767 UDP/IP (GameSpy Query Port)
28902 TCP/IP and UDP (Allows your Server to Connect to the Master Server Browser)
8075 TCP/IP (Port set via ListenPort that your WebAdmin will run on)
20610 UDP/IP (Steam Port)