/usr/lib/firewalld/icmptypes/ Current File: //usr/lib/firewalld/icmptypes/network-unreachable.xml

<?xml version="1.0" encoding="utf-8"?>
<icmptype>
  <short>Network Unreachable</short>
  <description>This message is sent if the destination network is unreachable.</description>
  <destination ipv4="yes"/>
  <destination ipv6="no"/>
</icmptype>