| 25RADVISION | RADVISION Port Security Reference GuideNote: Some firewalls are configured to block packets from the streaming server . You can eitherconfigure the firewall to allow streaming packets, or reconfigure the streaming server and clientto use different network protocols that cross the firewall boundary.The Streaming Server uses the IETF RTSP/RTP protocols. RTSP runs on top of TCP, while RTP runsover UDP. Many firewalls are configured to restrict TCP packets by port number and are veryrestrictive on the UDP. The streaming server can tunnel RTSP/RTP traffic through standard HTTP.Some firewalls may inspect traffic on port 80 and not allow the tunneled RTSP/RTP on that port.We therefore recommend using the QuickTime standard port 7070 as the alternate TCP port forHTTP tunneling. This is configured in the streaming server by default as long as you specify theport as part of the streaming server virtual address in the Streaming section of the SCOPIADesktop Server Administration section.5269 TCP Incoming XMPP Server for supporting proxyXMPP connections from SCOPIADesktop Server for SCOPIADesktop Clients.From SCOPIA Desktop ServerTable 1-16 Ports supported on the XMPP server for connecting with the SCOPIA Desktop ServerPortRangeProtocol Direction Severity Functionality Result of Blocking inApplication