NAT Filtering
PUREVPNDigital SecurityWhat is NAT Filtering?

What is NAT?

NAT stands for Network Address Translation. This is a service that’s used in routers. Its purpose is to translate a set of IP addresses to another set of IP addresses.

The primary reason for a NAT is to help preserve the limited amount of IPv4 public IP addresses that are available around the world.

NAT comes equipped with lower-end to business tier routers available in the market. Besides, NAT allows several devices (mobile phones, laptops, Smart TVs) to connect to the internet using a single IP address provided by ISP.

What is NAT Filtering?

NAT filtering adds a layer of security on your internet network, securing you against cyber threats. Think of NAT Filtering as the first line of defense which combats hackers from injecting malware data packets on your device(s).

Mainly, NAT filtering inspects each data packet before it decides what to do with those data packets. With that in mind, NAT filtering’s constant supervision limits any unwanted incoming traffic from entering into your internet connection.

Once NAT filtering receives intended data packets, it passes them on to the right intended device. NAT and NAT filtering are actively working on your router. During the filtering process, if NAT comes across any unidentified source or hacker, the NAT firewall takes over.

What is a NAT Firewall?

A NAT firewall works by only permitting internet traffic to pass through the gateway if a device on the private network has requested for it. Any uninvited requests or data packets are discarded, preventing communication with potentially dangerous devices on the internet.

If inbound internet traffic does not have a private IP address to forward to beyond the gateway, the NAT firewall knows the traffic is unsolicited and should be discarded. That’s how NAT filtering is performed and protects users against harmful cyber threats.

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NAT Filtering on PS4

When it comes to the online gaming world, NAT filtering plays a crucial role. If you are among those who aren’t facing any NAT errors on their PS4 gaming console, you’re truly blessed. We highly encourage you to don’t play with your router’s NAT settings.

Often, NAT issues occur when there’s a communication error between a PS4 and the server or the router. In PS4, NAT types are classified as Type 1, Type 2, and Type 3.

Type 1 Type 2 Type 3
Open Moderate Strict

In essence, anyone with Type 1 will experience uninterrupted online gameplay. A person with Type 2 will face certain interruptions in their gaming experience while a person with Type 3 will not be able to host gameplay nor receive chat messages properly.

In short, it’s recommended that you choose NAT Type 1 to enjoy seamless connectivity and a refined online gaming experience.

NAT Filtering on Xbox One

PS4’s major competitor, XBOX One, also suffers from NAT type issues. With an Xbox, NAT issues are pretty common, and they completely disrupt your flow if you’re unable to connect with an online player.

Online gamers have to manually set the NAT Type to Open when they’re getting Moderate or Strict NAT settings. With Open NAT settings, players can conveniently communicate with each other and play online games without interruptions.

Learn how to change NAT type on an Xbox One.

Ather Owais Ather Owais is a tech and cybersecurity enthusiast. He is a strong advocate for online privacy and security, following technological trends and their impact on today's digital era.

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