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then (Firewall Filters)


Hierarchy Level


Configure a filter action.



Action to accept, discard, or forward packets that match all match conditions specified in a filter term.


Additional actions to analyze, classify, count, or police packets that match all conditions specified in a filter term.

The inline-monitoring-instance action maps the instance for inline monitoring services to the firewall term. You must attach the inline monitoring filter under inet or inet6 family of the logical unit of the interface for applying inline monitoring on the ingress or egress direction. Starting in Junos OS Release 21.1, the inline-monitoring-instance option is also supported by the any, bridge, ccc, mpls, and vpls families.

Required Privilege Level

firewall—To view this statement in the configuration.firewall-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 9.0.

inline-monitoring-instance option added in Junos OS Release 19.4R1 on MX Series routers with MPCs excluding MPC10E and MPC11E linecards.

Added additional family support to the inline-monitoring-instance option in Junos OS Release 21.1R1.