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To allow a single IP address across the firewall, execute the command: $ sudo firewall-cmd -permanent -add-source=192.168.2.50 To block a service, for instance, FTP, execute: $ sudo firewall-cmd -remove-service=https

To allow a service such as https, execute the command: $ sudo firewall-cmd -add-service=https

Network services are defined in the /etc/services file. Similarly, blocking a UDP port will follow the same syntax: $ sudo firewall-cmd -remove-port=53/udp -permanent $ sudo firewall-cmd -remove-port=22/tcp -permanent To block a TCP port, like port 22, run the command. The -permanent flag ensures that the rules persist even after a reboot. Similarly, to add a UDP port, specify the UDP option as shown: $ sudo firewall-cmd -add-port=53/udp -permanent Note that you have to specify whether the port is a TCP or UDP port after the port number: $ sudo firewall-cmd -add-port=22/tcp -permanent To add a port, say port 443 for HTTPS, use the syntax below. Once done with the configurations, always ensure that you reload the firewall for the new rules to take effect. Firewalld allows you to add and block ports, blacklist, as well as whitelist IP, addresses to provide access to the server.

Now that we have firewalld running, we can go straight to making some configurations. Check Firewalld Status Configuring Rules using Firewalld You can also find information on How to Forward a Port here.Ĭheck out more information and solutions to Common Connection Problems.The output below confirms that the firewalld service is up and running. This will vary depending on your make and model of router, and instruction booklets are often included with your router or can be found on the manufacturer's website. On your router, you would need to open the following ports 443, 4355 If you have firewall and antivirus software installed on your computer, make sure you have added exceptions for įor instructions on how to do this check your firewall software's website. You can set up exceptions in your computer and router's firewall to allow successful access. If RuneScape is being blocked by your firewall, you would be unable to connect to our servers - often preventing login or stopping you from connecting successfully to a world. Not able to log in or connect to a world? Make sure your Firewall isn't blocking RuneScape.