Post #2431263

Firewalld sudo apt-get install firewalld systemctl enable --now firewalld # ssh on port 22 opened but otherwise most things blocked by default firewall-cmd --get-active-zones firewall-cmd --info-zone=public firewall-cmd --zone=public --add-port=1234/tcp firewall-cmd --runtime-to-permanent There are some decent guides online. Also take a look in /etc/firewalld/firewalld.conf and see if you want to change anything. Pay attention to the part about Docker. You need to know about zones, ports, and interfaces for the basics. Services are optional. Policies are more advanced. I suggest it for your laptop, too.