When installing ufw closes all the ports

Thu, 23 Jan 2025 03:00:00 -0700

There comes a time in my setup of a Linux/Unix system where I want to tinker with the firewall. And I usually install ufw — the “Uncomplicated Firewall” to do it. It’s not complicated, and I like that.

But if you have existing services running on your server or workstation that you installed with a Linux package manager such as apt or dnf/yum, you have to remember to reopen all the ports you need, because the installation of ufw on most systems closes all of those ports.

Homelab on passthejoe

When installing ufw closes all the ports