VPN connectivity problem

[titas]

Today I am having problems about a VPN issue. When I try to connect VPN I see an error-789. Please let me know how to fix Error 789 L2TP on Windows 7 (64bit)

[titas]

Today I am having problems about a VPN issue. When I try to connect VPN I see an error-789. Please let me know how to fix Error 789 L2TP on Windows 7 (64bit)

[stormium]

1. Incorrect secret key (pre-shared key in Windows)
Solution: Ensure that shared secret is configured correctly on the client machine. It must match between the MX and the client. More information about setting the shared secret can be found in the links at the top of the page.

2. Firewall blocking traffic to VPN traffic to MX
Solution: Ensure UDP ports 500 (IKE) and 4500 (IPsec NAT-T) are being forwarded to the MX and not blocked. If traffic cannot reach the MX on these ports, the connection timeout and fail.

3. IKE and AuthIP IPsec Keying Modules disabled (Windows only)
Solution: This occurs most often when 3rd party VPN software has been installed and disables the IKEEXT service. This can be re-enabled by navigating in Windows to Control Panel > Administrative Tools > Services. Find the service named "IKE and AuthIP IPsec Keying Modules" and open it. Change the Startup type to "Automatic". If this automatically reverts to "Disabled" or fails to start, it may be necessary to remove the 3rd party VPN software.