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Application Mappings

 

JSA includes default application IDs. However, you can edit the application mapping file to ensure that traffic is appropriately classified in JSA.

What is an Application ID?

When JSA detects a flow, it assigns an application ID to the flow. The application ID is assigned based on the protocol and ports that are used for the flow, and the flow content. JSA default application IDs are allocated based on the Service Name and Transport Protocol Port Number Registry (http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt).

What Tasks Are Required to Map Applications?

When you create or customize an application mapping, do the following tasks in sequence:

  1. Defining New Applications

    The application configuration file contains default applications. To define new applications, you must add new applications IDs to the application configuration file.

  2. Map traffic to the new applications by using one of the following methods:

    • Define application mappings

      Update the application mapping file, which maps applications to application IDs based on IP address and port number.

    • Define application signatures

      Define application signatures to apply to flows that the default application mapping does not automatically detect. To assign application IDs to flows, this method requires you to create rules that are based on IP address, port, and content. To define port-only application signatures, configure port mappings in the application mapping file, not the application signatures file.