QuickTime streaming media protocol details

QuickTime streaming example

The following example shows the typical client and server connections required for QuickTime streaming.

If a firewall did not allow one or more of the required ports, the NetCache appliance would use HTTP encapsulation over TCP port 80 to send data to servers or clients. This scenario is not illustrated.

Understanding QuickTime connection requirements

The following table describes the types of protocols NetCache must service to deliver streaming media content to clients.

Use the proceeding table to configure the NetCache appliance and associated network devices, such as a switch, router, or firewall, that must pass traffic to and from the NetCache appliance. To ease configuration, the Appliance Manager provides default settings that correspond to the port information provided in the following table.

Protocol	Transport	Explanation	Upstream traffic	Downstream traffic
RTSP	TCP	Real Time Streaming Protocol. Used to coordinate the delivery of streaming media.	Received on NetCache port 554 Sent to port 554	Received on arbitrary NetCache port Sent from port 554 to arbitrary client ports
RTCP	UDP	Real-Time Control Protocol. Provides quality of service information for QuickTime streams.	Received on NetCache port 2001 Sent to arbitrarily advertised UDP ports	Received on NetCache port range 6970 to 65000 Sent from NetCache port 2001 to arbitrarily advertised UDP ports
RTP	UDP	Real-Time Transport Protocol. Used for data transport for all QuickTime streams.	N/A	Received on NetCache port range 6970 to 65000 Sent from NetCache port 2000 to arbitrarily advertised UDP ports
HTTP	TCP	HTTP encapsulation is used from NetCache to clients and NetCache to servers when the firewall blocks TCP or UDP.	Received on NetCache port 80 Sent to origin server port 80 Can also be sent over port 7070	Received from origin server port 80 or 3128 Sent from NetCache port 80 or 3128