Linux heracles.o2switch.net 4.18.0-553.62.1.lve.el8.x86_64 #1 SMP Mon Jul 21 17:50:35 UTC 2025 x86_64

//proc/self/root/lib/firewalld/services/dhcp.xml

 <?xml version="1.0" encoding="utf-8"?>
<service>
  <short>DHCP</short>
  <description>This allows a DHCP server to accept messages from DHCP clients and relay agents.</description>
  <port protocol="udp" port="67"/>
</service>