How to Adjust/increase/reduce the RTCP/RTP Port Ranges for use with RTSP

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To stream applications via RTSP, the App-V server uses three channels that are carried through three TCP sockets. First, the App-V client uses the RTSP channel to set up a connection with the App-V Management or Streaming Server. The server opens two private ports (one for the RTP channel and one for the RTCP channel.) The server also sends the port numbers to the client in a response. The client then opens two sockets. Then, the client connects to the private ports that are created on the server. The application is then streamed over the RTP channel. The RTCP channel provides real-time control over the data channel.

For each application that is streamed to an App-V client, a new set of RTP and RTCP channels are created. However, all streamed applications use one common RTSP channel. The RTSP channel is also used to discover available applications on the App-V server.

The default port range is from 49152 to 65535. This can be adjusted on either the streaming server (lightweight) or the Management server (heavyweight) but each one uses different configuration sources.

RtpTcpMinPort

This defines the low\minimum\start range for the private ports.  This will be used for both RTP and RTCP. For the App-V Streaming Server, it is found in the registry at the following location:

Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SoftGrid\4.5\DistributionServer

Value: RtpTcpMinPort

Data Type: DWORD

The default value is 49152 but the accepted ranges are from 1,025 - 65535.

For the App-V Management Server, this configuration comes from the SQL App-V Datastore. The database table that stores this is SOFTGRID_SERVERS and the column is rtp_min_port. The default value is 49152 but the accepted ranges are from 1,025 - 65535.

RtpTcpMaxPort

This defines the high\maximum\stop range for the private ports.  This will be used for both RTP and RTCP. For the App-V Streaming Server, it is found in the registry at the following location:

Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SoftGrid\4.5\DistributionServer

Value: RtpTcpMaxPort

Data Type: DWORD

The default value is 65535 but the accepted ranges are from 1,025 - 65535.

For the App-V Management Server, this configuration comes from the SQL App-V Datastore. The database table that stores this is SOFTGRID_SERVERS  and the column is rtp_max_port. The default value is 65535 but the accepted ranges are from 1,025 - 65535.

Installation Options on the Streaming Server

Both RTPTCPMINPORT and RTPTCPMAXPORT are available command line options during the installation of the App-V Streaming Server. These options are not available on the App-V Management Server installer.