Opening Ports for Alien Swarm Server using Your Router

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Port Forward Staff
May 19, 2022 (Last Updated: ) | Reading Time: 1 minutes
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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:

Use a VPN Instead

Have you considered using a VPN instead of forwarding a port? For most users, a VPN is a much simpler and more secure choice than forwarding a port.

We use and recommend NordVPN because not only is it the fastest VPN, it includes a new feature called Meshnet that makes forwarding a port no longer necessary for most applications. With NordVPN Meshnet, you can connect to your devices from anywhere in the world, completely secure, over a highly encrypted VPN tunnel.

When shopping for a VPN, make sure that they meet the following criteria:

This is the list of requirements that we used when we were shopping around for a VPN provider. There are lots of free, shady VPN providers out there that we looked at and dismissed.

Based in Panama, using diskless servers, and with over 6,100 servers in 61 countries, we can safely say that NordVPN satisfies all of these requirements.

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Once you've set up your NordVPN account on multiple computers and enabled Meshnet, you can seamlessly access all of your devices as if they were on the same network. You don't even have to log in to your router. It's very simple.

Every time you click on one of our affiliate links, such as NordVPN, we get a little kickback for introducing you to the service. Think of us as your VPN wingman.

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

Forward Ports for Alien Swarm Server

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

Alien Swarm Server - PC

  • TCP: 27015
  • UDP: 27015

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

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