Although I have had webmin on the server for ages, and keep looking at Fing, I didn’t have any real time monitoring of the network. This has now been addressed thu the installation of nagios
Took a bit of figuring which version of nagios to install for FreeBSD. Nagios 4 aka Core is available in the ports so was quite an install, once I realised I was missing mod_cgi from my Apache configuration. The CGI files where coming down as downloads and not running as scripts. That and checking Nagios had access to the folders.
Still struggling with plug-ins and add-ons. The default add-ins have been installed from the ports but there are lots more on the Nagios website, but not sure how to install now. So plenty of spare weekends and evenings tinkering with now the core service is up and running.