The ports that need to be forwarded for Team Fortress Classic Server are listed here:
Team Fortress Classic Server - PC
- TCP: 27015
- UDP: 27015
Set Up a Port Forward for Team Fortress Classic Server

You might need to forward some ports in your router when you use Team Fortress Classic Server. The purpose of forwarding ports is to make a direct connection from the internet to Team Fortress Classic Server.
Routers do not generally allow incoming connection requests from the internet. By forwarding ports you can work around this limitation.
Before You Forward a Port
Make sure that you know these things before forwarding a port:
- Your router's IP address.
- The internal IP address of your computer.
- A list of TCP and UDP ports that need to be forwarded.
Find Your Router's IP Address
You can run our free Router Detector software to locate your router's IP address. It is part of our Network Utilities suite of tools and is free for you to use it.
You can also follow our Find Your Router IP Address article.
How To Forward Ports for Team Fortress Classic Server
A smart way to forward your ports is to use Network Utilities. 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.
You can also choose to set up port forwards manually. The way to forward a port is:
- You can start by logging in to your router.
- Locate your routers port forwarding section.
- Type your computer's IP address into the correct box in your router.
- Put the TCP and UDP ports for Team Fortress Classic Server in the corresponding 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 Team Fortress Classic Server:
List of Routers - Customized for Team Fortress Classic Server
That is the process required to forward ports in your router for Team Fortress Classic Server.