Current File : //lib/firewalld/services/dns-over-tls.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>DNS over TLS</short>
  <description>DNS over TLS (DoT) is a security protocol for encrypting and wrapping Domain Name System (DNS) queries and answers via the Transport Layer Security (TLS) protocol</description>
  <port protocol="tcp" port="853"/>
</service>