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

//lib/firewalld/services/collectd.xml

 <?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Collectd</short>
  <description>Collectd is a monitoring system that allows metrics to be sent over the network. This rule allows incoming collectd traffic from remote boxes.</description>
  <port protocol="udp" port="25826"/>
</service>