How to Open Ports for Arma 3 Behind CGNAT  

  • 28 January 2025
  • 5 mins read

Table of Content

Table of Contents

Arma 3 is a thrilling military sandbox game that immerses players in tactical combat and large-scale strategic missions. If you're experiencing connection issues or difficulties joining servers, your ports are probably not open. 

This guide covers opening specific ports on your router to maintain stable connections between your device and the game's servers, even if your router sits behind CGNAT.

What is Port Forwarding?

Port forwarding is a simple networking method that sends incoming internet traffic to specific devices on your private network by opening certain ports on your router. This is especially important for gamers hosting private servers for games like Arma, Minecraft, League of Legends, or Call of Duty.

Before You Forward a Port 

You need to know the following before opening ports for Arma 3

  • The IP address of your router 
  • The IP address of your device (computer or console)
  • Port numbers (UDP and TCP)

Default Ports for Arma 3 

To ensure smooth connectivity and gameplay in Arma 3, you'll need to forward the following default ports:

  • TCP: 2344-2345, 27015, 27036
  • UDP: 2302-2305 (Game server ports) & 2344-2345 (Steam ports for server listing and queries)

How to Open Ports for Arma 3

You can follow these steps for port forwarding Arma 3 on your router:

  1. Select any browser (Google Chrome) and insert your router's default gateway IP in the address bar.
  2. Insert the username and password to log in to your router page (username is "admin," and the password is "password" if you haven't changed it).
  3. Select Advanced and navigate to the Port Forwarding option.
  4. Select the Add Service or Add Rule button.
  5. Enter a name for the new port forwarding rule (Arma 3).
  6. Select the protocol (TCP or UDP).
  7. Insert the port number you want to forward. 
  8. Use the same port number for Internal and External Port Numbers.
  9. Insert the static IP address of the device to which you wish to forward the port.
  10. Click Apply or Save.
  11. Restart your router.

Why is Opening Ports behind CGNAT an Issue?  

Most ISPs perform CGNAT to prevent IPv4 exhaustion and network congestion. CGNAT is a networking technique that saves IPv4 addresses and assigns multiple users a single public IP address. However, if you want to open ports on a router, chances are your IP address can be blocked or blacklisted. 

How to Open Ports on Routers Behind CGNAT

With PureVPN's Port Forwarding add-on and dedicated IP, you can easily bypass CGNAT and set up port forwarding on routers (AT&T Fiber, Verizon Fios, Google Fiber, CenturyLink, and Optimum). Just follow these easy steps:

  1. Login to the PureVPN member area.
  2. Click the subscription tab.
  3. Click Configure.
  4. Apply your desired port settings.
  5. Click Apply settings.

Frequently Asked Questions (FAQs)

  • Can I test if my Arma 3 port forwarding is working?

    Plus

    The game might not connect properly, or it could expose your network to security risks.n

  • Can I host a server without port forwarding?

    Plus

    We don't recommend hosting servers through third parties or other services because they are unsafe compared to port forwarding your own router at home.

  • How do I access my router to set up port forwarding?

    Plus

    Type your router's IP address on a web browser and log in with admin credentials.

  • Is there an alternative to port forwarding?

    Plus

    Yes, gaming VPNs can bypass NAT restrictions and improve connectivity.

In Summary

Enjoy Arma 3 while enhancing your tactical gaming experience with PureVPN's port forwarding add-on and dedicated IP. With just a few clicks, you can ensure uninterrupted connections to games like Arma 3, Call of Duty: Warfare, Minecraft, Fortnite, and more.