Custom application signatures

Application identification supports custom (user-defined) application signatures on devices. Custom application signatures are unique to your environment and are not part of the predefined application package. Custom application signatures are required to bring visibility for unknown or unclassified applications, to identify applications over Layer 7 and transiting or temporary applications, and to achieve further granularity of known applications.

 Junos OS supports the following types of custom signatures: ?

• ICMP-based 
• IP protocol-based 
•  Address-based 
• Layer 7-based 

You can create custom application signatures using the CLI by specifying a name, aprotocol (as applicable), the port where the application runs (as applicable), and the match criteria.