Installed firewall but unsure if it's running properly

[accounts0]

I installed arno-iptables-firewall & answered the questions during setup, but its status says it's dead. Is there more I need to do?

$ sudo service arno-iptables-firewall status
● arno-iptables-firewall.service - Arno's Iptables Firewall                                                                                            
   Loaded: loaded (/lib/systemd/system/arno-iptables-firewall.service; disabled; vendor preset: enabled)                                               
   Active: inactive (dead)

[TheFu]

In Linux, the firewall is part of the kernel. Any extra tools you install to interface with it are just that, interface tools.

I have never heard of the package you mentioned.
There is a README here: https://github.com/arno-iptables-firewall/aif which explains how to get help. Seems to be a firewall script created for fairly advanced users.

Normally, people on ubuntu use ufw, gufw on desktops and iptables on servers to manage the built-in firewall. I've seen mention of firewalld from time to time, but have only seen that on CentOS/RHEL systems. It might be available on newer Ubuntu releases than I run. 16.04 is my newest release.

[accounts0]

Normally, people on ubuntu use ufw, gufw on desktops and iptables on servers to manage the built-in firewall.

Switched to gufw, much better- thanks.