All About Fix VPN connection failed due to unsuccessful domain name resolution

All About Fix VPN connection failed due to unsuccessful domain name resolution

In today’s digital age, virtual private networks (VPN) have become a crucial tool for ensuring online privacy and security. However, sometimes users may encounter issues, such as a failed VPN connection due to unsuccessful domain name resolution. This can be frustrating, especially when trying to access important data or work remotely. In this article, we will delve into the common causes and troubleshooting tips for fixing this problem, helping you get your VPN connection back up and running smoothly. So, whether you are a beginner or an experienced user, read on to learn all about fixing VPN connection failures due to unsuccessful domain name resolution.

Fix: VPN connection failed due to unsuccessful domain name resolution

VPNs (Virtual Private Networks) have become increasingly popular for individuals and businesses, as they provide a secure connection to a private network over the internet. However, there are times when users encounter errors while trying to connect to a VPN, one of which is the “VPN connection failed due to unsuccessful domain name resolution” error. This error can be frustrating as it prevents the establishment of a secure connection to the VPN server.

What causes the “VPN connection failed due to unsuccessful domain name resolution” error?

The most common causes of this error are incorrect DNS settings, faulty network drivers, or an issue with the VPN server. DNS (Domain Name System) is responsible for resolving domain names to IP addresses, and if there is an issue with your DNS settings, it can result in the “unsuccessful domain name resolution” error. Similarly, if the network drivers are outdated or corrupt, it can also lead to this error.

How to fix the “VPN connection failed due to unsuccessful domain name resolution” error?

1. Check your network settings

The first step is to check your network settings, particularly your DNS settings. You can do this by going to your Control Panel, clicking on Network and Sharing Center, and then on Change adapter settings. Right-click on your network adapter and select Properties. Under the Networking tab, click on Internet Protocol Version 4 (TCP/IPv4) and then on Properties. Make sure that “Obtain DNS server address automatically” is selected.

2. Flush DNS cache

Sometimes, the DNS cache can become corrupted, causing issues with resolving domain names. To fix this, open the Command Prompt as an administrator and type in the command “ipconfig /flushdns” and press Enter. This will clear your DNS cache.

3. Update network drivers

If your network drivers are outdated or corrupt, it can also result in the “VPN connection failed due to unsuccessful domain name resolution” error. To update your network drivers, go to your device manager, expand the Network Adaptors section, right-click on your network adapter, and select Update Driver. You can also download the latest driver from the manufacturer’s website and install it manually.

4. Change DNS server

If the above methods do not work, you can try changing your DNS server. You can use Google’s Public DNS ( and or OpenDNS ( and To change your DNS server, follow the steps mentioned in method 1, but instead of selecting “Obtain DNS server address automatically,” select the option to “Use the following DNS server addresses” and enter the desired DNS server IP addresses.

5. Check VPN server status

There could also be an issue with the VPN server itself. You can check the status of the server by contacting your VPN service provider or checking their website or social media pages for any announcements or updates.

In conclusion, the “VPN connection failed due to unsuccessful domain name resolution” error can be frustrating to encounter, but it can be easily fixed by following the above methods. If none of these methods work, it is recommended to contact your VPN service provider for further assistance. Make sure to also keep your network drivers and software up to date to avoid such errors in the future.

1. Change DNS Settings

DNS (Domain Name System) is essentially the phonebook of the internet. It translates the web addresses that we type into our browsers into the IP addresses of the servers that host those websites. Without DNS, we would have to remember a series of complex numbers instead of simple website names. However, sometimes the default DNS settings provided by our internet service providers (ISPs) may not be efficient or reliable. In such cases, it may be necessary to change the DNS settings to improve the overall internet experience. Here’s a guide on how to change DNS settings on different devices:

1. On a Windows computer:

– Open the Control Panel and click on “Network and Internet” followed by “Network and Sharing Center.”
– Click on “Change adapter settings” on the left panel.
– Right-click on your network connection (usually “Local Area Connection” or “Wireless Network Connection”) and select “Properties.”
– Select “Internet Protocol Version 4 (TCP/IPv4)” and click on “Properties.”
– In the General tab, select “Use the following DNS server addresses” and enter the preferred and alternate DNS server addresses. You can use public DNS servers like Google ( and or OpenDNS ( and
– Click “OK” to save the changes.

2. On a MacOS computer:

– Go to “System Preferences” and click on “Network.”
– Select your network connection (Wi-Fi, Ethernet, etc.) and click on “Advanced.”
– Go to the DNS tab and click on the “+” button to add DNS servers. You can use the same public DNS servers mentioned above.
– Click on “OK” to save the changes.

3. On an iOS device:

– Go to “Settings” and tap on “Wi-Fi.”
– Tap on the (i) icon next to the connected Wi-Fi network.
– Scroll down and tap on “Configure DNS.”
– Select “Manual” and tap on “Add Server.”
– Enter the DNS server address and tap on “Save.” You can add multiple DNS servers by tapping on “Add Server.”

4. On an Android device:

– Go to “Settings” and tap on “Wi-Fi.”
– Press and hold on the connected Wi-Fi network and select “Modify Network.”
– Check the box next to “Show advanced options.”
– Under “IP settings,” select “Static” and scroll down to the “DNS 1” and “DNS 2” fields.
– Enter the DNS servers of your choice and tap on “Save.”

Once you have successfully changed the DNS settings on your device, you may need to restart your internet connection for the changes to take effect. This can be done by simply turning off and on your Wi-Fi or by restarting your device.

By changing your DNS settings, you may experience faster internet speeds, improved security, and better overall browsing experience. It also allows you to bypass censorship and access websites that may be restricted in your region. So, if you’re looking to optimize your internet connection, consider changing your DNS settings and see the difference for yourself.

2. Repair the anyconnect.xml file

2. Repair the anyconnect.xml file

If you are an avid user of the AnyConnect VPN client, you may have encountered an issue where the client fails to connect to your desired network or continuously disconnects. This can be frustrating, especially when you need to access important files or systems remotely. One common cause of this issue is a corrupted anyconnect.xml file. This file contains information about the VPN connections and settings, and when it gets damaged, it can cause connectivity problems. Luckily, it is possible to repair the anyconnect.xml file and resolve the issue. In this blog post, we’ll guide you through the steps to repair this file and get your AnyConnect client up and running again.

Step 1: Locate the AnyConnect Folder

The first step is to locate the AnyConnect folder on your computer. This folder is typically found in the following path:

C:\ProgramData\Cisco\Cisco AnyConnect Secure Mobility Client\

Note: The ProgramData folder is often hidden, so make sure to enable hidden items in your File Explorer settings to access it.

Step 2: Close AnyConnect and take a backup

Before you make any changes, make sure to close the AnyConnect client. This will ensure that there are no active processes that may affect the repair process. Once it is closed, create a backup of the anyconnect.xml file in case something goes wrong. You can simply copy and paste the file to a different location on your computer.

Step 3: Open anyconnect.xml file in a Text Editor

Next, open the anyconnect.xml file in a text editor like Notepad or Notepad++. This file contains a structured XML code, so make sure not to change any of the formatting while editing it.

Step 4: Locate and Delete the Affected Group

In the anyconnect.xml file, locate the section that corresponds to the network you are trying to connect to. This will be indicated by the tag. Once you find it, delete this entire section, including the tag and the following lines of code. This will remove the corrupted data and allow AnyConnect to create a new connection when you try to reconnect.

Step 5: Save and Close the anyconnect.xml file

Once you have deleted the affected group, save the changes made to the anyconnect.xml file and close the text editor.

Step 6: Test the AnyConnect Connection

Now, restart the AnyConnect client and try to connect to the network again. If everything goes well, the client should be able to connect without any issues. In case the connection fails again, try deleting any other networks in the anyconnect.xml file that you do not use regularly.

In conclusion, a corrupted anyconnect.xml file can cause connectivity issues in your AnyConnect client. By following the steps mentioned above, you can easily repair this file and get your VPN client working again. However, if the problem persists, you may need to reinstall the AnyConnect client or seek assistance from the AnyConnect support team. We hope this guide was helpful in resolving your AnyConnect connectivity issue.

3. Connect to another region (with different VPN HEs)

In today’s interconnected world, virtual private networks (VPNs) have become an essential tool for tech-savvy individuals to protect their online privacy and access restricted content. With the rise of geographically restricted content, users often need to connect to VPN servers in different regions to access their desired content. In this blog, we will explore the process of connecting to another region with different VPN providers.

Step 1: Choose the Right VPN Provider
The first step is to choose a reliable and trustworthy VPN provider that offers servers in the region you want to connect to. Take your time to research and compare different providers based on their server locations and reputation.

Step 2: Download and Install the VPN Client
Once you have chosen your VPN provider, download and install their client software on your device. Most reliable VPN providers offer user-friendly clients for multiple platforms, including Windows, Mac, iOS, and Android.

Step 3: Launch the VPN Client and Select the Region
Once you have installed the VPN client, launch it and log in using your credentials. Next, you will be presented with a list of available server locations. Choose the region you want to connect to and click on the “Connect” button.

Step 4: Wait for the Connection
The VPN client will now establish a secure connection with the server in the chosen region. This process may take a few seconds, depending on your internet speed and the distance between your current location and the chosen server.

Step 5: Check Your IP Address
Once the connection is established, you can check your new IP address to confirm that you are connected to the chosen region’s server. You can use online tools such as to check your IP address. If the displayed IP address matches the server’s location, then you have successfully connected to another region using a VPN.

Step 6: Enjoy the Benefits
Now that you are connected to the server in a different region, you can enjoy all the benefits that come with it. With a new IP address, you can access region-locked content, securely browse the internet, and protect your online activities from prying eyes.

Some Things to Keep in Mind
While using VPNs to connect to different regions has its advantages, it also comes with some limitations. Your internet speed may be affected due to the distance between your location and the server. Additionally, some streaming platforms and websites may have VPN detection systems that can block your access. In such cases, you may need to switch to a different server within the same region or try a different VPN provider.

In conclusion, connecting to another region with different VPN providers is a useful skill to have for anyone who values online privacy and wants to access geo-restricted content. By choosing the right VPN provider, following the necessary steps, and keeping the limitations in mind, you can easily and securely connect to different regions and enjoy a seamless online experience.

4. Disable or Uninstall 3rd party firewall

Firewalls are an essential security measure for any device connected to the internet. They act as a barrier between your device and the network, blocking any malicious traffic and protecting your data from potential cyber-attacks. While most operating systems come with a built-in firewall, many users choose to install third-party firewall software for added protection. However, there may be situations where you would want to disable or uninstall the third-party firewall. In this blog, we will discuss the reasons for disabling or uninstalling a third-party firewall and how to do it effectively.

Why Disable or Uninstall a Third-Party Firewall?

1. Incompatibility issue: Sometimes, a third-party firewall may not be compatible with your operating system or other security software installed on your device. This can cause conflicts and lead to system crashes or other performance issues.

2. Unnecessary resource consumption: Third-party firewalls are known to be resource-intensive. If you have limited system resources, having multiple firewalls running simultaneously can slow down your device.

3. Difficulty in configuration: Third-party firewalls are usually designed for advanced users and may require a certain level of technical knowledge to configure correctly. If you find it challenging to configure the firewall, it might be better to disable or uninstall it.

4. Cost: Some third-party firewalls come with a subscription fee, and you may find it expensive to keep renewing the license. In such cases, it would be more economical to use the built-in firewall of your operating system.

How to Disable or Uninstall a Third-Party Firewall?

1. Disabling the Firewall: If you want to temporarily disable the third-party firewall, you can do so by right-clicking on its icon in the system tray and selecting the ‘Disable’ option. You can also open the firewall settings and look for the option to turn it off. Once disabled, the built-in firewall of your operating system will automatically take over.

2. Uninstalling the Firewall: If you want to completely remove the third-party firewall from your device, you can do so by following the steps below:

– Go to ‘Control Panel’ and select ‘Programs and Features.’
– Locate the third-party firewall in the list of installed programs.
– Right-click on it and select ‘Uninstall’ or ‘Remove.’
– Follow the on-screen instructions to complete the uninstallation process.
– Once the firewall is uninstalled, restart your device, and the built-in firewall will be enabled automatically.

Note: Some third-party firewalls may require you to use an uninstallation tool provided by the software developer to completely remove it from your device.

In conclusion, disabling or uninstalling a third-party firewall can cause a temporary vulnerability in your device’s security. If you choose to do so, it is essential to ensure that the built-in firewall of your operating system is enabled and functioning correctly. Additionally, it would be best to have other security measures in place, such as antivirus software, to protect your device from potential threats.

5. Disable Proxy server or 3rd party VPN

5. Disable Proxy server or 3rd party VPN

A proxy server, or third-party virtual private network (VPN), can be a useful tool for maintaining online privacy and accessing restricted content. However, there are times when it may be necessary to disable these services. In this blog post, we will discuss five scenarios where this may be necessary and how to disable them.

1. Connection Issues
One common reason for disabling a proxy server or VPN is when you are experiencing connection issues. These services can sometimes interfere with your network settings and cause connectivity problems. If you notice that your internet is slow or you are unable to access certain websites, try disabling the proxy or VPN to see if it resolves the issue.

To disable a proxy server, go to your browser’s settings and find the network or proxy settings. Then, turn off the option to use a proxy server. If you are using a third-party VPN, simply turn off the VPN connection.

2. Government or Workplace Restrictions
Some workplaces or countries may have strict restrictions on internet usage, and they may require the use of a proxy server or VPN to bypass these restrictions. However, in some cases, these services may still be detected and blocked. If you are facing difficulties accessing certain sites or online services, try disabling the proxy or VPN and see if it helps.

3. Malware Attacks
Malware can sometimes change your internet settings and use a proxy server to redirect your traffic. If you suspect that your device has been infected with malware, it’s important to disable any proxy or VPN that may have been set up without your knowledge. You can then run a thorough scan of your system using a trusted anti-malware software.

4. Privacy Concerns
While a proxy server or VPN can help protect your online privacy, there may be situations where you want to disable them for privacy reasons. For instance, if you are using a public Wi-Fi network, it’s generally safer to disable any third-party proxy or VPN connections. This will help prevent any potential data breaches or unauthorized access to your private information.

5. Troubleshooting Technical Issues
In some cases, a proxy server or VPN may not be functioning properly, and this can cause technical issues with certain websites or online services. If you are experiencing any unusual errors or bugs while using a proxy or VPN, try disabling them and see if the problem persists. If it does, then the issue may be unrelated to the proxy or VPN and may require further troubleshooting.

In Conclusion
While a proxy server or third-party VPN can provide added security and privacy, there may be times when it’s necessary to disable them. By following the steps outlined above, you can easily disable these services and troubleshoot any potential issues. However, it’s always important to use caution when using the internet, and regularly scan your system for any potential threats.

6. Disable DNS Error Assist (if applicable)

DNS Error Assist is a feature that is present in some internet browsers to help redirect users to a particular webpage when there is a DNS error. This means that if a user types in a web address that does not exist or is mistyped, the browser will try to redirect the user to a search engine or a similar website instead of showing an error message.

While this feature may seem helpful, many users have reported it to be more of a nuisance than a benefit. Not only does it slow down browsing speed, but it also prevents users from accessing certain websites that may have an incorrect DNS configuration.

In this blog post, we will discuss how to disable DNS Error Assist in various internet browsers.

1. How to Disable DNS Error Assist in Google Chrome
– Open Google Chrome and click on the three vertical dots in the top-right corner.
– Click on “Settings” from the dropdown menu.
– Scroll down and click on “Advanced” to expand the settings menu.
– Under “Privacy and security,” click on “Privacy and security” again to access more options.
– Scroll down and under “Security,” toggle off the “Use a prediction service to help complete searches and URLs typed in the address bar” option.
– This will disable DNS Error Assist in Google Chrome.

2. How to Disable DNS Error Assist in Mozilla Firefox
– Open Mozilla Firefox and type “about:config” in the address bar.
– Click on “I accept the risk” if a warning message appears.
– In the search bar, type “browser.urlbar” and press Enter.
– Double-click on the “browser.urlbar.speculativeConnect.enabled” option to set its value to “false.”
– This will disable DNS Error Assist in Mozilla Firefox.

3. How to Disable DNS Error Assist in Safari
– Open Safari and click on “Safari” in the menu bar.
– Click on “Preferences” and then click on the “Advanced” tab.
– Untick the “Include search engine suggestions” option.
– This will disable DNS Error Assist in Safari.

4. How to Disable DNS Error Assist in Microsoft Edge
– Open Microsoft Edge and click on the three horizontal dots in the top-right corner.
– Click on “Settings” from the dropdown menu.
– Scroll down and click on “Privacy and services.”
– Under “Address bar,” toggle off the “Show me search and site suggestions using my typed characters” option.
– This will disable DNS Error Assist in Microsoft Edge.

5. How to Disable DNS Error Assist in Opera
– Open Opera and click on the three horizontal lines in the top-left corner.
– Click on “Settings” and then click on “Advanced.”
– In the left-hand menu, click on “Features.”
– Under “Privacy and security,” toggle off the “Instant search” option.
– This will disable DNS Error Assist in Opera.

6. How to Disable DNS Error Assist in Internet Explorer
– Open Internet Explorer and click on the gear icon in the top-right corner.
– Click on “Internet options” and then click on the “Advanced” tab.
– Scroll down to the “Browsing” section and untick the “Use a prediction service to help complete searches and URLs typed in the address bar” option.
– Click on “Apply” and then “OK” to save the changes.
– This will disable DNS Error Assist in Internet Explorer.

Disabling DNS Error Assist can significantly improve browsing speed and prevent redirection to unwanted websites. If

7. Clean install or repair install

When your computer starts running slow and experiencing errors, it may be time for a clean install or a repair install. These are two different approaches to fixing computer issues, and the choice between them depends on the severity of the problems you are experiencing.

Clean Install:

A clean install is a complete wipe of your computer’s hard drive and a fresh installation of the operating system. This means all of your files, programs, and settings will be erased, and your computer will be restored to its original state. A clean install is often used as a last resort when troubleshooting more severe issues. Here are some benefits of a clean install:

1. Fixes Deep-rooted System Issues:

When your computer is cluttered with various files, programs, and settings, it can lead to system issues that are difficult to pinpoint. A clean install erases all of these files and gives you a fresh start, eliminating any deep-rooted issues that may be causing your computer to malfunction.

2. Improves Performance:

Over time, as you use your computer, the performance can start to degrade due to the accumulation of temporary files, corrupted programs, and other junk. A clean install helps to free up space and remove any unnecessary programs, resulting in improved performance.

3. Removes Malware:

If your computer is infected with malware or viruses, a clean install is a sure-fire way to remove them completely. Sometimes, traditional antivirus software is not enough to fully remove malware, and a clean install may be the only solution.

Repair Install:

A repair install, also known as an in-place upgrade, is a less invasive method of fixing computer issues. Instead of wiping everything from your hard drive, a repair install will only replace the damaged or corrupted system files while preserving your personal files, programs, and settings. Here are some reasons why a repair install may be the better option:

1. Saves Time and Effort:

A clean install will erase all of your data, making it necessary to back up your files, reinstall your programs, and reconfigure your settings. A repair install avoids all of that hassle and saves you time and effort.

2. Keeps your Personal Files and Settings:

If you have important files and programs that you do not want to lose, a repair install is the way to go. It only fixes the system files, leaving your personal data intact.

3. Addresses Specific Issues:

If you are experiencing a specific issue, such as a corrupted system file or a buggy program, a repair install can fix that particular problem without wiping your entire hard drive.

In conclusion, a clean install and repair install are two different approaches to fixing computer issues. A clean install is more drastic but can fix deep-rooted system issues and improve performance, while a repair install is less invasive and can address specific issues while preserving your personal data. It is always advisable to back up your important files before attempting either method, and if you are not sure which option is better for your situation, consult a professional.


In conclusion, fixing a VPN connection failed due to unsuccessful domain name resolution can be a frustrating and time-consuming issue. However, by following the steps outlined in this article, you can easily troubleshoot and resolve the issue. From checking your network settings to resetting your router, there are various methods you can try to successfully connect to your VPN. It is also important to ensure that your VPN software is up-to-date and that your internet connection is stable. By taking the necessary precautions and following these steps, you can easily fix VPN connection issues and enjoy a secure and unrestricted internet experience. Remember, if you are still facing difficulties, do not hesitate to seek help from your VPN provider or IT support team. With the right approach, you can quickly resolve

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