VPN

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

Have you ever seen the error “The VPN connection failed due to unsuccessful domain name resolution” when trying to connect to a VPN? You’re not the only one. This issue is common, especially when using the NC State VPN (Cisco Secure Client). Luckily, there are steps you can take to fix this and get your VPN working again.

The main reason for this error is often a clash between the VPN server’s DNS and your device’s DNS settings1. This clash is more common with free VPN clients because they might not be set up right1. But, it can also happen with trusted VPN services like Systweak VPN1.

This guide will show you how to find and fix the “VPN connection failed due to unsuccessful domain name resolution” error. By the end, you’ll know what causes it and how to fix it.

What Is the “VPN Connection Failed Due to Unsuccessful Domain Name” Error?

The “VPN connection failed due to unsuccessful domain name” error happens when the VPN client can’t find the VPN server’s domain name2. This issue can stem from wrong VPN server names, internet problems, or issues with the VPN client or its setup3.

Common Causes of the Error

One reason for this error is when a VPN server’s DNS clashes with the device’s DNS3. This often occurs when users change their DNS settings and then try to connect to a VPN3. Using a free VPN can also increase the chance of this error, as free servers might not work well with DNS settings3.

Windows 10 users sometimes see this error with Cisco AnyConnect Secure Mobility Client2. A customer had this issue on a Windows 7 laptop when trying to connect to a Cisco ASA 5515x via AnyConnect client2. They tried using the Cisco ASA’s IP and Domain name but failed2.

This error often points to DNS (Domain Name System) issues, causing connection problems2. It can also happen if the VPN app has wrong settings or if the public DNS isn’t working right4.

In summary, the “VPN connection failed due to unsuccessful domain name” error can be caused by many things. These include wrong VPN server names, internet problems, VPN client issues, and DNS settings problems234.

Verify the VPN Server Name

If you’re seeing the “VPN connection failed due to unsuccessful domain name” error, start by checking the VPN server name in the Cisco Secure Client2. This issue is common for Windows 10 users using the Cisco AnyConnect Secure Mobility Client2.

Open the VPN client and make sure the server name is correct. If it looks wrong or doesn’t match “vpn.ncsu.edu,” delete what’s there and type the right server name5. After fixing the server name, hit “Connect” and see if you can pick a group and log in5.

If problems persist, you might need to dig deeper6. Some folks found that logging in as a root user worked, but not without root access6.

  1. Make sure the VPN server name is correct in the Cisco Secure Client.
  2. Clear the current server name and enter “vpn.ncsu.edu.”
  3. Hit “Connect” and check if you can choose a group and log in.

Getting the VPN server name right is key to fixing the “VPN connection failed due to unsuccessful domain name” error. Double-checking this can help you avoid simple mistakes and move to more complex troubleshooting if needed.

vpn connection failed due to unsuccessful domain name

If the VPN client still shows the error after checking the server name, it might be a local network issue. Make sure there’s an internet connection on the device by visiting sites like ncsu.edu or google.com outside the VPN7. If the internet works, reinstall the Cisco Secure Client to keep it updated and error-free7.

See also  Tor vs VPN: What's the Best for Online Privacy?

Verify DNS Settings

Often, the “VPN Connection Failed Due to Unsuccessful Domain Name Resolution” error comes from DNS settings on the device2. Try changing the DNS settings to a reliable server like 8.8.8.8 (Google DNS) or 1.1.1.1 (Cloudflare DNS)7. This can fix any DNS issues that might block the VPN connection3.

  1. Open the Network and Sharing Center on your Windows device.
  2. Click on “Change adapter settings” and right-click on the active network connection.
  3. Select “Properties” and then click on “Internet Protocol Version 4 (TCP/IPv4)”.
  4. Choose “Use the following DNS server addresses” and enter 8.8.8.8 and 8.8.4.4 as the preferred and alternate DNS servers, respectively.
  5. Click “OK” to save the changes and try reconnecting to the VPN.

If changing the DNS settings doesn’t fix the problem, reinstalling the VPN client might help. This ensures it’s set up right and free of errors2.

The “VPN Connection Failed Due to Unsuccessful Domain Name Resolution” error can also stem from security software like anti-spyware or content filters7. Check these settings to make sure they’re not blocking the VPN723.

Check Your Internet Connection

If you’re seeing the “VPN connection failed due to unsuccessful domain name” error, check your internet first. This problem might not be with your VPN, but with your network8.

Try visiting websites not related to your VPN to see if you can connect. If you can’t get to these sites, it means your internet is the issue2. This could be from your internet service provider (ISP), router, or network setup.

If your internet is the problem, reach out to your ISP for help. They can fix any network issues stopping your VPN from connecting3.

Checking your internet and fixing any network problems can solve the “VPN connection failed due to unsuccessful domain name” error. This will help you get a stable VPN connection823.

Reinstall the VPN Client

If you’re still seeing the “VPN connection failed due to unsuccessful domain name resolution” error, try reinstalling the VPN client. This action can fix any issues with the client software that might be causing the problem. Here’s how to do it step by step.

Step-by-Step Guide for Reinstallation

  1. First, uninstall the current Cisco AnyConnect Secure Mobility Client from your device. You can do this via the Control Panel or the Cisco AnyConnect Secure Mobility Client uninstaller.
  2. Then, go to the Cisco website and download the newest version of the Cisco AnyConnect Secure Mobility Client for your system9. This makes sure you have the latest and most reliable version of the client.
  3. Next, run the installer file and follow the instructions on the screen to finish the reinstallation.
  4. After it’s installed, open the Cisco AnyConnect Secure Mobility Client and try connecting to the VPN server again using the steps from Section 3.

Reinstalling the VPN client often fixes the “VPN connection failed due to unsuccessful domain name resolution” error9. This ensures the client software works right and matches the VPN server setup.

If reinstalling the VPN client doesn’t solve the problem, other issues might be at play, like your internet connection or DNS settings. In these cases, you’ll need to look into more troubleshooting steps, which we’ll discuss next.

Reinstall VPN Client

Modify DNS Settings

If you’re seeing the “VPN connection failed due to unsuccessful domain name resolution” error, it might be your Windows device’s DNS settings. Changing these settings can often fix the problem. Let’s look at how to adjust your DNS settings to solve the VPN connection issue.

How to Change DNS Settings on Windows

To change your DNS settings on a Windows device, follow these steps:

  1. Open the Control Panel on your Windows computer.
  2. Navigate to Network and Internet > Network and Sharing Center.
  3. Click on the “Change adapter settings” option.
  4. Right-click on the network adapter you’re using for the VPN connection and select “Properties”.
  5. In the properties window, double-click on “Internet Protocol Version 4 (TCP/IPv4)”.
  6. In the TCP/IPv4 Properties window, select the “Obtain DNS server address automatically” option10.
  7. Click “OK” to save the changes and close the windows.
See also  Static IP vs Dynamic IP: Key Differences

Choosing the “Obtain DNS server address automatically” option means your Windows device will use DNS servers from your ISP or VPN. This can fix DNS issues causing the “VPN connection failed due to unsuccessful domain name resolution” error2.

If the issue doesn’t go away, try entering DNS server addresses of a trusted provider. Use Google’s DNS servers (8.8.8.8 and 8.8.4.4) or Cloudflare’s DNS servers (1.1.1.1 and 1.0.0.1).

Changing DNS settings might take some trial and error. So, feel free to try different settings until you find one that works for you10.

By adjusting your DNS settings as described, you can often fix the “VPN connection failed due to unsuccessful domain name resolution” error. This should help you connect to your VPN2.

Advanced Troubleshooting Steps

If the usual fixes didn’t work, there might be deeper issues. These could be firewall problems, outdated VPN software, or server issues11. You might need to get help from the VPN company or an IT expert.

Advanced steps include checking for firewall issues, updating VPN software, and looking at the server setup12. Also, test your internet, clear your browser cache, and pick a trustworthy VPN provider to fix tough VPN problems12.

  1. Check for Firewall or Security Software Conflicts: Firewalls and security tools might block your VPN. Turn off any firewalls or security tools and see if the VPN connects. If it does, tweak the firewall settings to let the VPN through.
  2. Update the VPN Client Software: Old or wrong VPN software can cause problems. Look for updates from the VPN provider and install the newest version.
  3. Verify VPN Server Configuration: Make sure the VPN server details like address, protocol, and login method are right. If unsure, ask the VPN provider for help.

If these steps don’t fix the problem, contact the VPN provider or an IT expert for more help. They can find and fix any VPN or network issues11.

Troubleshooting Step Description
Check Firewall and Security Software Turn off any firewalls or security tools to see if the VPN connects. Adjust settings to let VPN traffic through if needed.
Update VPN Client Software Install the latest VPN client software to fix compatibility and known issues.
Verify VPN Server Configuration Make sure the VPN server settings, like address, protocol, and login method, are correct.

If the “VPN connection failed due to unsuccessful domain name” issue still exists after these steps, get more help from the VPN provider or an IT expert11. They can find and fix any VPN or network problems.

Common User Queries and Solutions

Users often face the “VPN connection failed due to unsuccessful domain name” error. Here, we’ll cover common questions and solutions13.

If you can’t connect after trying troubleshooting, contact your VPN provider or IT support. They can help with specific issues related to your VPN setup13.

This problem isn’t just for Windows 7. Users on macOS and other systems have faced the “unsuccessful domain name” error with a Cisco VPN13.

To avoid this issue, follow the preventive steps we’ll discuss next. These steps can help prevent the “VPN connection failed” error in the future13.

Common User Queries Solutions
What if I still can’t connect after trying all the troubleshooting steps? Contact your VPN provider or IT support for further assistance.
Can this issue happen on other devices besides Windows 7? Yes, the error can occur on various operating systems when using a Cisco VPN client.
Is there a way to prevent this problem from happening in the future? Yes, following the preventive measures in the next section can help avoid the “unsuccessful domain name” VPN error.
See also  Is a VPN Legal in US? Know Your Rights

We aim to provide a full guide on the “VPN connection failed due to unsuccessful domain name” error and solutions13.

Domain name resolution errors are common when accessing websites14. A VPN failing due to these errors is a frequent issue for users14. Causes include incorrect domain names, expired domains, DNS/VPN server issues, network problems, and firewall issues14.

To fix the “VPN connection failed” issue, try changing DNS addresses, using different VPN networks, and reinstalling anyconnect.xml files14. Disabling firewalls, antivirus, VPN & proxy servers, and DNS Error Assist can also help14. Repairing the anyconnect.xml file ensures correct VPN settings for successful connections14.

The error of unsuccessful domain name resolution with Cisco AnyConnect has been discussed in the Cisco Community forums for nearly a decade15. VPNs are crucial for businesses, offering remote access to resources. A VPN failure can cause delays and reduce productivity, highlighting the importance of VPN reliability for business15.

VPNs provide encrypted connections for data safety. If users can’t connect via VPN, they might use unsecured connections, risking data exposure. This shows the security risks of VPN connection failures15. If issues persist with Cisco VPN, businesses might look for other VPN solutions15.

Private Internet Access (PIA) is a recommended VPN provider for its secure DNS, over 35,000 servers globally, unlimited bandwidth, strong encryption, and ad and malware blocker15. Troubleshooting includes checking internet connectivity, updating the VPN client, and verifying server availability to fix common VPN setup issues151314.

Preventive Measures for Future Connections

To avoid the “VPN connection failed due to unsuccessful domain name” error, take steps ahead of time. Update the Cisco AnyConnect Secure Mobility Client regularly to keep it compatible and fix issues16. Also, make sure your internet connection is stable and reliable before connecting to the VPN17.

Setting your DNS to “Obtain DNS server address automatically” is key. This can solve domain name problems17. Also, check and update the VPN server name when needed to stop future failures17.

If you keep having VPN connection problems, contact your VPN provider for help17. Their support team can offer guidance and fix any issues17.

VPN Provider Monthly Pricing (2-year plan) Devices Allowed Dedicated IP
NordVPN $3.4916 Up to 616 Yes16
Surfshark $2.2916 Unlimited16 Yes16
Norton VPN $3.3316 1, 5, or 1016 No16
Private Internet Access $2.0316 Unlimited16 Yes16

By taking these steps, you can greatly lower the chance of the “VPN connection failed due to unsuccessful domain name” error17. Being alert and proactive in fixing VPN issues can make remote access smooth and secure17.

Conclusion

The “VPN connection failed due to unsuccessful domain name resolution” error can be a real headache. But, it’s often caused by simple issues that are easy to fix18. By checking the VPN server name, ensuring your internet connection is stable, reinstalling the VPN client, and adjusting DNS settings, you can usually fix this error and get back into your VPN19. If the issue doesn’t go away, you might need to try more complex fixes or get help from IT support20. Taking steps to prevent this problem can also help you avoid it in the future.

This error can be a real annoyance, but it’s usually due to common network or setup problems that are easy to solve18. By knowing what might cause it and using the right steps to fix it, you can quickly get your VPN working again19. By being careful and taking steps to prevent it, you can reduce the chances of running into this error again. This ensures a smooth VPN experience.

Finally, the “VPN connection failed due to unsuccessful domain name resolution” error might be annoying, but it’s fixable with the right approach18. With the advice and tips from this article, you can easily solve the problem and get back to using your VPN. This lets you continue your work or activities without any trouble20.

Source Links

  1. https://systweak.com/blogs/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution/
  2. https://www.partitionwizard.com/partitionmanager/vpn-says-unsuccessful-domain-name.html
  3. https://www.systweak.com/blogs/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution/
  4. https://www.thewindowsclub.com/vpn-connection-failed-due-to-unsuccessful-domain-name-resolution
  5. https://campus.barracuda.com/product/networkaccessclient/doc/168099891/troubleshooting/
  6. https://forums.debian.net/viewtopic.php?t=157790
  7. https://community.spiceworks.com/t/cisco-anyconnect-vpn-not-working-after-configuring-firewall-with-isp-modem/952033
  8. https://www.linux-wlan.org/vpn/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution
  9. https://linux-wlan.org/vpn/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution
  10. https://www.electric.ai/blog/your-dns-server-might-be-unavailable-heres-why
  11. https://www.techrepublic.com/article/fix-the-four-biggest-problems-with-vpn-connections/
  12. https://www.kaspersky.com/resource-center/preemptive-safety/common-vpn-problems
  13. https://discussions.apple.com/thread/254321365
  14. https://techcult.com/fixes-for-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution/
  15. https://vpncentral.com/vpn-connection-failed-unsuccessful-domain-name-resolution/
  16. https://www.forbes.com/advisor/business/vpn-not-connecting/
  17. https://www.connectioncafe.com/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution/
  18. https://tech.joellemena.com/tech/the-vpn-connection-failed-due-to-unsuccessful-domain-name-resolution/
  19. https://community.spiceworks.com/t/issues-with-dns-over-vpn/442942
  20. https://openvpn.net/vpn-server-resources/troubleshooting-dns-resolution-problems/

Constant VPN

Join Constant VPN on this journey of unraveling the complexities of VPNs, ensuring that everyone can harness the power of constantvpn.com with confidence.

Related Articles

Back to top button