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2 September 2024·3 min read

VPN Connectivity Issues and How to Fix Them

Today, in the current digital environment, virtual private networks (VPNs) have become an essential tool for businesses seeking to secure communication and protect data privacy. Like any technology, VPNs can face connectivity issues that harm productivity and security. Here we explore the most common VPN connectivity problems and offer practical tips to resolve them.

First steps

One of the most frequent issues when using a VPN is slower connection speed. This can stem from several factors, such as VPN server overload, distance between the user and the server, or congestion on the local network. To address this we recommend:

  • Choose a nearby server: Connect to a VPN server geographically closer to your location to reduce latency.
  • Change protocol: Some VPN protocols, such as OpenVPN, can be slower than others such as IKEv2 or WireGuard. Switching protocol can improve speed.
  • Check your internet connection: Ensure your internet connection is not experiencing issues on its own before blaming the VPN.

Frequent disconnections

Unexpected disconnections when using a VPN can be extremely frustrating, especially when working with sensitive information or critical applications. Some possible fixes include:

Update the VPN client: Make sure you are using the latest version of the VPN software, as updates often include stability fixes.

Review firewall and antivirus settings: These can interfere with the VPN connection. Also confirm that your firewall and antivirus are configured to allow VPN traffic.

Reduce network load: If many devices are connected to the same network, this can cause disconnection issues. Try limiting the number of devices or switching to a less congested network.

Problems connecting to specific servers

Sometimes you may only experience issues when trying to connect to certain VPN servers. This can be due to blocks on those servers or a specific ISP (internet service provider) configuration. To resolve this:

  • Switch server: Try connecting to a different server in the same region or a nearby region.
  • Check for blocked servers: Some countries or ISPs block certain VPN servers. Check with your VPN provider to ensure you are using an unblocked server.

Authentication errors

If you receive an authentication error when trying to connect to a VPN, the issue may relate to access credentials or VPN client configuration. Try the following:

  • Check your credentials: Ensure you are entering the correct username and password. If in doubt, try resetting the password.
  • Synchronise system time: Sometimes a time mismatch between the device and the VPN server can cause authentication issues. Verify that your device’s clock is correct.

DNS issues

When connecting to a VPN, DNS issues are common and can prevent websites from loading correctly. To fix this:

  • Configure DNS servers manually: Use public DNS servers, such as Google’s (8.8.8.8 and 8.8.4.4) or Cloudflare (1.1.1.1), instead of your ISP’s defaults.
  • Enable DNS leak protection: Many VPN applications offer this option in their settings, helping prevent DNS queries from leaking outside the VPN tunnel.

VPN connectivity issues are very common, but most can be resolved with simple adjustments. Keeping your software up to date, choosing the right servers, and reviewing your network configuration are key steps to enjoying a stable, secure VPN connection.

If you want more tips and fixes for IT issues, follow our blog at ITCS! We publish useful content regularly to help you optimise your digital environment and keep your business running smoothly.

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