How to make Guacamole safe.

[Andrea Miconi]

My Guacamole is installed on a PC with Debian 12 and I use it to connect to my 
PCs and servers.
Besides G. there is nothing else installed; maybe later I will want to install 
Zabbix.
G. is now behind a firewall with HA-Proxy as reserver proxy.I wonder if I 
shouldn't secure the server anyway, for example using UFW or Failban.