Listing multiple ports in a service group

A service group can be defined for multiple protocols

Although most service groups can be defined for a single protocol (such as FTP), you can define a service group for multiple protocols as long as the ports use the same transport protocol (such as TCP). You can list up to eight ports in each service group. Listing multiple ports is useful for instances when two protocols always accompany one another. For example, UDP ports 554 and 2001 must both be redirected if you want to redirect both RealNetworks and QuickTime streaming traffic.

Example of multiple service group configuration

The following illustration shows one router, multiple appliances, and multiple service groups.

Appliance A is configured to handle only HTTP requests. Appliance A belongs to standard service group 0.Appliances B and C are configured to handle HTTP requests and MMS and RTSP requests over both TCP and UDP. Therefore, appliances B and C are each configured to belong to three service groups--standard service group 0, dynamic service group 1 for MMS and RTSP over TCP, and dynamic service group 2 for MMS and RTSP over UDP.

The router in this example must handle HTTP, MMS, and RTSP requests. Therefore, the router belongs to standard service group 0 (HTTP), dynamic service group 1 (MMS and RTSP over TCP), and dynamic service group 2 (MMS and RTSP over UDP).