Are a firewall and antivirus necessary in Kubuntu?

[greenster]

I'm keen to hear your thoughts...

Should I use a firewall and antivirus in Kubuntu?

At the moment, I'm not using either.

Is that risky?

[skyfishgoo]

as long as your router is set up properly you should not need a firewall on your device.

there is no AV software for linux, you have ad blockers for browsers and you avoid installing code from unknown sources (still to your distro's official repositories).

[Snowhog]

there is no AV software for linux

That isn't true.