Here is a list of the ports that need to be forwarded for Counter-Strike: Condition Zero Server:
Counter-Strike: Condition Zero Server - PC
- TCP: 27015
- UDP: 27015
Set Up a Port Forward for Counter-Strike: Condition Zero Server

When you use Counter-Strike: Condition Zero Server you may need to forward ports in your router. A port forward allows incoming connection requests from the internet to go straight to Counter-Strike: Condition Zero Server.
Routers do not generally allow incoming connection requests from the internet. By forwarding ports you can work around this limitation.
Before Forwarding a Port Checkoff This To Do List
Before forwarding a port make sure that you know these things:
- Your router's IP address.
- Your computer's internal IP address.
- The list of the TCP and UDP ports that you need to forward.
Locate Your Router's IP Address
You can run our free Router Detector software to locate your router's IP address. It's a part of the Network Utilities suite of tools and it's completely free to use.
If you do not want to run the software, you can follow our Find Your Router IP Address guide.
Forwarding a Port for Counter-Strike: Condition Zero Server
The easiest way to forward your ports is to use our Network Utilities software. Our Network Utilities software allows you to add port forwards and also remove them when you no longer need them to maximize your network security.
Another option is to go through the process of forwarding ports one step at a time. The way to forward a port is:
- You can start by logging in to your router.
- Look for the port forwarding section in your router.
- Put the IP address of your computer in the proper box in your router.
- Put the TCP and UDP ports that you are forwarding for Counter-Strike: Condition Zero Server in the correct boxes in your router.
Some routers need to be rebooted in order for the changes to be saved.
You can choose your router from our list to see exactly how to forward ports for Counter-Strike: Condition Zero Server:
List of Routers - Customized for Counter-Strike: Condition Zero Server
That's all it takes to forward your ports for Counter-Strike: Condition Zero Server.