• Fri. Dec 1st, 2023

How to Block VPN on Router: A Detailed Guide

Alejandra Reynoso

ByAlejandra Reynoso

Oct 5, 2023

In the digital age, where data privacy and security are paramount, VPNs (Virtual Private Networks) have become a go-to solution. However, there are scenarios where blocking VPN access on a router is necessary, such as for network administrators seeking to maintain control over network traffic and prevent any unauthorized access. Let’s dive into the specifics on how to block VPN on router.

  • Key Takeaways
  • Understanding the need to block VPNs
  • Setting up access control lists
  • Using Firewall and advanced security settings
  • Frequently asked questions about blocking VPNs on routers

Table of Contents

  1. The Need to Block VPNs
  2. Setting Up Access Control Lists
  3. Using Firewall for Blocking VPNs
  4. Advanced Security Settings
  5. Frequently Asked Questions

The Need to Block VPNs

VPNs, while beneficial for privacy and security, can sometimes be a concern for system administrators. A VPN can bypass network restrictions, which might lead to unauthorized access or breach of company policies. It can also be a problem in a home setting, where parents might want to control the content their children access online.

Blocking VPNs is not a straightforward task as VPN traffic can often blend with regular internet traffic. However, it is possible to block VPN access on a router using various methods.

Setting Up Access Control Lists

The first method involves setting up Access Control Lists (ACL). This method is commonly used in Cisco routers and involves blocking the IP addresses associated with known VPN servers.

To do this, you would need to log into your router’s administration console and navigate to the ACL section. Here, you can manually input the IP addresses you wish to block, effectively preventing any devices on your network from connecting to those VPN servers. Here is a comprehensive guide from Cisco on how to set up ACLs on their routers.

However, this method can be time-consuming and requires constant updating of the blocked IP addresses as new VPN servers emerge.

Using Firewall for Blocking VPNs

Another method to block VPNs on a router is by using the router’s firewall settings. This involves blocking the ports commonly used by VPN protocols. Most VPNs use specific ports, like 1723 for PPTP or 500 for IPsec.

To implement this, you would need to access your router’s firewall settings and manually block these ports. For a detailed guide on how to do this, refer to this article.

However, bear in mind that blocking these ports might affect other services that use the same ports.

Advanced Security Settings

Some routers come with advanced security settings that can detect and block VPN traffic. These settings are usually found in the router’s administration console under the security or firewall section. They work by detecting the encryption used by VPNs and blocking it.

However, these settings may not be available on all routers, and even when available, they might not be completely effective as some VPNs use advanced techniques to disguise their traffic.

Frequently Asked Questions

  1. Can blocking VPNs affect other services?
    Yes, blocking VPNs, especially by blocking ports, can affect other services that use the same ports.

  2. Can all routers block VPNs?
    Not all routers have the necessary features to block VPNs effectively. However, most commercial and enterprise routers do have these features.

  3. Is blocking VPNs legal?
    Yes, blocking VPNs is legal, especially in a network administration context where it’s important to control network traffic.

Blocking VPNs on a router can be a complex task, requiring a good understanding of how VPNs work and how your router’s settings can be manipulated. However, with a little patience and the right knowledge, it’s certainly achievable. For more information on network administration and VPNs, you can check out these articles on access control lists, firewall settings, and advanced security settings.

Alejandra Reynoso

By Alejandra Reynoso

Alejandra Reynoso is a passionate writer with a gift for creating engaging and informative website articles. With a background in journalism and business with a flair for storytelling, she has mastered the art of captivating readers with her words. Alejandra's writing covers a diverse range of topics, from business and money to news and politics.