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/dropbox-lansync.xml

 <?xml version="1.0" encoding="utf-8"?>
<service version="1.0">
  <short>dropboxlansync</short>
  <description>Dropbox LAN sync</description>
  <port protocol="udp" port="17500"/>
  <port protocol="tcp" port="17500"/>
</service>