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Understanding GTP Message-Type Filtering

 

You can configure the device to filter GPRS tunneling protocol (GTP) packets and permit or deny them based on their message type. By default, the device permits all GTP message types.

A GTP message type includes one or many messages. When you permit or deny a message type, you automatically permit or deny all messages of the specified type. For example, if you select to drop the sgsn-context message type, you thereby drop sgsn-context-request, sgsn-context-response, and sgsn-context-acknowledge messages.

You permit and deny message types based on the GTP version number. For example, you can deny message types for one version while you permit them for the other version.