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 ...

The extremely popular Ubuntu operating system comes quipped with a built-in firewall technology. In this article we will show an easy way to enable/disable the firewall utility in Ubuntu.

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 ...