How to Open Ports for Roblox Behind CGNAT  

  • By Farrukh Mushtaq

    Farrukh Mushtaq

    Author Image

    Farrukh Mushtaq, a digital marketer at PureSquare, possesses a keen interest in cybersecurity and enjoys writing about it. With several years of experience in the digital marketing industry, he brings expertise and passion to his work.

    See author profile
  • 3 February 2025
  • 5 mins read

Table of Content

Table of Contents

Roblox is an online platform that features millions of games across various genres, including adventure, simulation, role-playing, and first-person shooters. It relies on a stable internet connection for smooth gameplay, especially in multiplayer modes. If you experience connectivity issues, consider opening ports on your router for Roblox.

This guide explains how to open ports on your router for Roblox, even if your network is behind CGNAT.

What is Port Forwarding?

Port forwarding for gaming allows external devices to connect to a console or PC through specific router ports, improving connectivity. It helps with features like hosting multiplayer games and voice chat.

Before You Forward a Port 

You need to know the following before opening ports for any game and application: 

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

Default Ports for Roblox 

For the best experience, ensure these ports are open on your router to avoid connection issues:

  • UDP: 49152–65535 (for gameplay and voice chat)
  • TCP: 443 & 80 (for website and authentication)

How to Open Ports for Roblox

You can follow these steps to port forward Roblox 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 (the username is "admin," and the password is "password" if you haven't changed it).
  3. Click on 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 (Roblox).
  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?  

ISPs (Internet service providers) perform (CGNAT) Carrier-Grade NAT to allow multiple users to share a single public IP address. This technique helps conserve IPv4 addresses and reduces network congestion. However, it also blocks access to ports on your router, making port forwarding impossible.

How to Open Ports on Routers Behind CGNAT

By getting PureVPN's Port Forwarding add-on and a dedicated IP, you can bypass CGNAT. This feature works seamlessly on routers (Starlink, Xfinity, Spectrum, Frontier, and Cox) for popular games such as Roblox, Minecraft, and Call of Duty: Modern Warfare III. Follow the given easy steps to get started.

  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 open ports with a mobile hotspot?

    Plus

    No, mobile networks often use CGNAT and are unsafe for port forwarding. They are easily traceable by hackers and snoopers, and it is not recommended that a hotspot be created for long hours.

  • Is it safe to open ports for Roblox?

    Plus

    No, but if you use a VPN with a port forwarding add-on, you can safely open ports for Roblox without the risk of unauthorized access or instability.

  • Do I need to forward ports for single-player mode?

    Plus

    No, port forwarding is only required to host multiplayer servers.

  • Is port forwarding free?

    Plus

    Yes, port forwarding itself is free; all you have to do is configure your routers. But to do it correctly and automatically, you can always use a port forwarding add-on.

In Summary

Play Roblox and many other games online with a smoother connection using PureVPN's port forwarding add-on and dedicated IP, which allows you to bypass CGNAT and seamlessly open relevant ports. You can port forward games like Fortnite, FIFA 23, Call of Duty: Warzone, Minecraft, and more in just a few clicks.