Like many Linux distributions, Windows, and macOS, Ubuntu has a firewall. This security feature can prevent connections from unwanted sources on your system. Sometimes, though, you might want to ...

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While keeping the firewall on is probably a good idea for the less tech-savvy, there may come a time where they have to turn it on and off. Here's a simple guide to help them do it on their own. A ...

During Redhat 9's install, i specifically said to disable the firewall. Now, i installed lmule and it tells me that it can't reach port 4662. How can i find out if the firewall is turned on or off? I ...

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.