Linux vacca.o2switch.net 4.18.0-553.123.2.lve.el8.x86_64 #1 SMP Thu May 7 23:17:13 UTC 2026 x86_64

//usr/lib/firewalld/icmptypes/echo-request.xml

 <?xml version="1.0" encoding="utf-8"?>
<icmptype>
  <short>Echo Request (ping)</short>
  <description>This message is used to test if a host is reachable mostly with the ping utility.</description>
</icmptype>