Q: What does a firewall do, and is it something I need to get? A: In the early days of the internet, we often connected through a dial-up modem or some other form of direct connection. When you ...

Q: What’s a firewall and do I need one at home? A: Focusing on internet security is key to staying safe online, and a firewall serves as a critical element of defense for your entire home network. The ...

And if you do the common thing of setting the admin passwords the same (or using really weak ones) then that comprimised host can easily infect other systems. Patch the system, it's simple, you can do ...

Linux is highly secure, but you should still have a firewall. You should know if your ISP's hardware (gateway) uses a firewall. One of the easiest Linux firewalls is UFW and its GUI sidekick, GUFW.