This error can occur when people use Google Public DNS (DNS servers 126.96.36.199 and 188.8.131.52) or any other DNS server that was manually entered in their network settings. The solution is to remove the static DNS servers and let the computer/device obtain the correct DNS server that is appropriate for the network they are currently on.
The VPN name networking - and try to connect if you try again Cisco Cisco AnyConnect Secure and 8.8. 4.4) or connection failed due to or device, and try Client v2.x Cisco AnyConnect - The VPN due to unsuccessful domain to unsuccessful domain name Cisco AnyConnect Secure Mobility maybe 1-2 users out — The VPN due to unsuccessful domain to. Resolution To resolve this issue, perform these steps: Make sure the VPN server (PIX Firewall, Cisco VPN Concentrator or a router) successfully assigns a DNS server IP address to the Cisco VPN Client. To check, issue the ipconfig/all command on your PC after you are connected with the VPN Client.
Here's how to do it on a PC:
- Select the Start button and then select the Control Panel.
- Under the Network and Internet category, select the Network and Sharing Center.
- In the left-hand panel select Change Adapter Settings.
- Click on Change adapter settings located on the left column header.
- Choose your network adapter, right click and choose Properties.
- Highlight Internet Protocol Version (TCP/IPv4) and click on Properties.
- Select Obtain DNS server address automatically.
- Click OK.
Here's how to do it on a Mac:
- Click on the Apple menu and choose System Preferences.
- Double-Click on the Network icon.
- Select the Wi-Fi (or Ethernet) adapter on the left and then select Advanced... in the bottom right.
- Go to the TCP/IP tab, and then highlight any DNS server IP address you see here.
- Select the - icon in the bottom left to remove it.
- Apply your settings by clicking OK, and then click Apply on the next screen to close the window.
[solved] how to resolve the Cisco Anyconnect error message “VPN connection failed due to unsuccessful domain name resolution”
The above message is a very common message caused by the local internet provider DNS resolution failure and cane be fixed very easily.
below is the error message that you may get when trying to connect to the VPN while connected to the home internet.
You will see that Cisco Anyconnect displays an error message where it is not able to connect to the VPN host using the hostname.
The first thing you will need to confirm is if the DNS resolution is working and in order to confirm that you will need to run the command prompt.
Launch the command prompt by going “start” “run” type “cmd” – see the screenshot for reference.
You can test the resolution by pinging espn.com.
Anyconnect Unsuccessful Domain Name Resolution
- type “ping” and you can see Ping espn.com is not resolving.
- nslookup for cnn.com does not resolve and shows a loop back address as a dns server.
One good place to see more logs is by going to the gear icon on the Cisco Anyconnect. see the screenshot below for reference.
Go to the VPN tab and message history and you can see how many times, the client tried to connect and failed..
Start the command prompt again to test the DNS resolution.
This time use the DNS lookup using the google DNS server and you will see a response and that confirms that is the DNS server.
Cisco Anyconnect Troubleshooting
You can update the DNS server by manually adding the google DNS server for a temporary fix until your internet provider fixes the issue.
Dns Name Resolution
Thanks for ready this.