Description

How to block fragmented packets with a firewall filter on EX Switches

Symptoms

This article provides a basic example for blocking fragmented packets from/to a host.  See documentation link provided for additional details related to creating firewall filters.

Solution

Fragmented packets coming from a destination can be blocked with the filter given below:

set firewall family inet filter test term fragment from destination-address 95.130.168.194/32
set firewall family inet filter test term fragment from is-fragment
set firewall family inet filter test term fragment then discard
Then the filter can be applied to an interface.



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