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VPN Connection Failed Due to Unsuccessful Domain Name Resolution

VPN Connection Failed

It happened along with a lot of users who are using the Cisco AnyConnect Secure Mobility Client. If you guys are actually facing a “VPN failed due to unsuccessful domain name resolution” issue. Then it actually means your Cisco clients do not really establish a successful VPN connection. There is also an issue along with your DNS Settings. In this article, we are going to talk about VPN Connection Failed Due to Unsuccessful Domain Name Resolution. Let’s begin!

It is mostly resolved along with minor DNS tweaking and establishes a VPN connection via the Cisco AnyConnect Client. When verify from the client side that AnyConnect is properly installed and ready to use along with your PC. By this, you can make sure that there is no fault from the AnyConnect Client.

How to Fix VPN Connection Failed Due to Unsuccessful Domain Name Resolution

A lot of windows 11/10 users are facing this problem right now due to some VPN establishment. So we also listed a lot of methods in order to fix the VPN connection that failed because of a DNS issue.

Repair anyconnect.xml File | VPN Connection Failed

The best way in order to repair anyconnect.xml file is just to remove this Cisco AnyConnect Client properly from your PC and then reboot the PC. Then you have to install a fresh copy of the software step by step. At last, make ensure that it is properly install as well.

As the main problem of the “VPN connection failed due to unsuccessful domain name resolution” error is that many times anyconnect.xml File is corrupted. And unable to make a VPN connection as well. You guys can also try to connect to another region as well. Maybe it can also make a successful connection and then repair the file.

Change DNS Settings

It can also change your DNS server’s IP in order to resolve any misconfiguration on the internet connection. There are a lot of DNS available on the internet. Such as Google DNS, Open DNS, and Comodo Secure DNS.

Many times the problem is resolved after removing these and resetting DNS settings to default in windows as well.

  • On Windows 10, just right-tap on the start menu and tap on Network Connections.
  • Now you guys can see the network you are connected to, now just right-click on it and then head to properties.
  • Now, you have to double tap on Internet Protocol Version 4 (TCP/IPv4).
  • A new dialog box will now pop up where you guys have to choose Obtain DNS server address automatically.
  • Tap on Ok in order to save settings.

One of the primary reasons that basically cause VPN connection failed error is because of third-party VPN clients. Such as Cisco VPN does not support static IP connections as well. So if You guys are using Google Public DNS, Open DNS, as well. You have to change it in order to a dynamic setting.

Reinstall Your Operating System | VPN Connection Failed

In the last, if the problem is not fix via doing all the above methods. Then the last possible way is to install a fresh copy of the operating system. Then, it can also resolve all of your custom DNS settings, and you guys can install the Cisco client.

Before reinstalling Windows OS, first, take a backup of all of your important files and folders as well. Then you can reset or install a fresh copy of Windows OS. By doing this, you can get all the settings by default. After that, you just have to properly install the cisco client and then see how it can successfully make a VPN connection.


Alright, That was all Folks! I hope you guys like this article and also find it helpful to you. Give us your feedback on it. Also if you guys have further queries and issues related to this article. Then let us know in the comments section below. We will get back to you shortly.

Have a Great Day!

Also See: How to Reset your AirPods Pro – User Guide

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Windy Moore

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