FreeBSD is a Unix-like operating system mainly used in the server environment due to its extraordinary performance and stability in a networking environment.
It stands for Berkeley Software Distribution, and dates back to the early nineties, and with subsequent releases, it has focused on security, which is why there are three separate firewall solutions available: IPFW, IPFilter and PF.
Administrative access is provided via SSH, with the root username and the password chosen during setup.
There are no particular customization options on this template, as this is a minimal FreeBSD installation that leaves space for any type of use.
The only special feature is that Fail2ban is preconfigured to prevent any bruteforce login attempts on SSH.