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/lightning-network.xml

 <?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Lightning Network</short>
  <description>The default port used by Lightning Network.  Enable this option if you plan to be a Lightning Network node.</description>
  <port protocol="tcp" port="9735"/>
</service>