/usr/lib/firewalld/services/ Current File: //usr/lib/firewalld/services/bittorrent-lsd.xml

<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>BitTorrent Local Peer Discovery (LSD)</short>
  <description>Local Peer Discovery is a protocol designed to support the discovery of BitTorrent peers on a local area network. Enable this service if you run a BitTorrent client.</description>
  <port protocol="udp" port="6771"/>
  <destination ipv4="239.192.152.143" ipv6="ff15::efc0:988f"/>
</service>