Firstly, for a home PC, behind a router isit important to install/configure a firewall?
If so, how do I do it? I have
lamp-server installed as I'm a web developer. I may want my other PC's on LAN to access my files or web pages, ssh in (maybe in the future), but not from outside. How can I configure this? From work, I learnt that I keep blocking myself all the time, also
denyhosts is useful for bruteforce hacking. But problem is I am not a System Admin so I keep blocking myself (including others) instead. Maybe
gufw + denyhosts maybe a good start