Opening Ports for Alien Swarm Server using Your Router

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Port Forward Staff
Last Updated: | Reading Time: 1 minutes

The ports that need to be forwarded for Alien Swarm Server are listed here:

Alien Swarm Server - PC

  • TCP: 27015
  • UDP: 27015

Forward Ports for Alien Swarm Server

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You may need to forward ports in your router when you use Alien Swarm Server. A port forward allows incoming connection requests from the internet to go straight to Alien Swarm 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

Before you can forward a port you need to know the following things:

Find the IP Address of Your Router

We have free Router Detector software to help you find your router's IP address. The software is part of our Network Utilities suite of tools and it is completely free to use.

Otherwise, you can follow our guide Find Your Router IP Address.

Setting Up a Port Forward for Alien Swarm Server

You can use our Network Utilities software to automatically forward ports for you. Network Utilities lets you manage port forwards by putting them in when you need them and also removing the ones that you no longer need which maximized network security.

Another option is to go through the process of forwarding ports one step at a time. The normal process for forwarding a port is:

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 Alien Swarm Server:

List of Routers - Customized for Alien Swarm Server

Those are the steps to take in order to forward ports in your router for Alien Swarm Server.

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