As you may know, not all services are enabled and allowed by default in openSUSE/SUSE systems. For example, ssh service is not allowed through firewall on openSUSE systems. Of course, it’s a safety precaution, but sometimes we must need ssh service to access the system from a remote location.
This quick tutorial will show how to allow services, not only ssh, but all other services such as http, ftp etc., through firewall. We can allow the services from YaST, which is the default installation and configuration tool for openSUSE, and SUSE enterprise.
First, open YaST Control Center from menu. Go to Security and Users -> Firewall.
Go to Allowed Services tab. Select Secure Shell Service from the Service to Allow drop-down box, and finally click Add, Next and Finish buttons to allow the service.
That’s it. The ssh service has been allowed now, so you can access the system from a remote system. Like this way, we can also other required services.