Cisco Anyconnect Vpn Unsuccessful Domain Name Resolution

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You are trying to connect to MIT's VPN on vpn.mit.edu, but get an error:

Restart the computer or device, and try to connect again. The VPN connection failed due to unsuccessful domain name resolution. 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. Enter the Domain name in the field provided and then click Apply. Verify AnyConnect VPN Connectivity. Click on the AnyConnect Secure Mobility Client icon. In the AnyConnect Secure Mobility Client window, enter the gateway IP address and the gateway port number separated by a colon (:), and then click Connect. Feb 16, 2015 Q: Cisco VPN - Connection failed unsuccessful domain name resolution. You are trying to connect to MIT's VPN, but get an error: The VPN connection failed due to unsuccessful domain name resolution. The cause is not fully known, but this is seen more frequently when people are using Google Public DNS (DNS servers 8.8.8.8 and 8.8.4.4).

The VPN connection failed due to unsuccessful domain name resolution.

Answer

First, make sure that the problem only affects the Cisco VPN. Test vpn.mit.edu with other tools such as a web browser, or 'ping' the hostname.

The cause is not fully known, but this is seen more frequently when people are using Google Public DNS (DNS servers 8.8.8.8 and 8.8.4.4)

Try using another DNS server, such as your ISP's DNS server
Try sending some pings to vpn.mit.edu before connecting; these can help cache the IP address in your DNS cache.
Wait a few minutes and try connecting again; the connection can work if you try again later.