Open TCP Port on openSUSE Firewall

Open TCP Port on openSUSE Firewall

 In this post i will show how to open a firewall on openSUSE and ensure that the setting is made permanent. I will now open terminal on GNOME and open TCP port 1978

Opening Port using GNOME TERMINAL

 Command to add port to

sudo firewall-cmd --zone=public --add-port=1978/tcp

Command to keep the port open permanently
sudo firewall-cmd --runtime-to-permanent

Remove open Port
sudo firewall-cmd --zone=public --remove-port=1978/tcp

Error that you will see if we try to re-open an Open Port
opensuseleap@localhost:~> sudo firewall-cmd --zone=public --add-port=1978/tcp
[sudo] password for root:
Warning: ALREADY_ENABLED: '1978:tcp' already in 'public'
success

 GNOME terminal showing addition of port 1978 on openSUSE 15.2

Opening Port using YAST / GUI

• Search for firewall in GNOME Shell Activities
• Click and open Firewall tool
• Provide password
• In the firewall tool
  
• Click on "public" Zone in the left pane
• Then Click on "Ports" tab to open ports
• Enter TCP Port 1978
• Click on "Accept" button to save changes.

GNOME Shell Activities Showing YAST Firewall

 

Screenshot of YAST Firewall Tool with Labels explaining Addition of port

Refer:- Opening Ports YaST2 Firewall

Note:- Solution tested on openSUSE Leap 15.2, GNOME SHELL VERSION 3.34.4