The main reason why this update stopped L2TP/IPSEC VPNs from working is that NAT traversal was disabled. To get your VPN back up and running, just follow our instructions. The below registry edit will fix the VPN.
How to fix L2TP connection?
Make sure our own L2TP/IPsec required ports are enabled after the servers on the VPN side.
Connect to another device or network via VPN. Try connecting to L2TP VPN from another device (for example, from another device).
Delete and re-create the VPN connection.
How to manually configure a VPN on Windows 10?
Right-click the Start button.
Click Settings. Source: Windows headquarters.
Click Network and Internet.
Click VPN. Source: Central
Click Windows Add a very VPN connection.
Click on other VPN providers in the dropdown menu. Windows Source: Central
Click Windows (embedded).
Click in the Connection name field.
Just enter a VPN connection name.
Click on the “Server Name”, “Address” and “To” field.
How do I setup VPN in Windows 10?
On the current Windows 10 taskbar, click the entire Windows icon.
When the Windows Settings activation form appears on your desktop screen, it’s mostly the network and the Internet.
Then click on VPN on the left side.
In the VPN window, click Add VPN Connection.
Select Windows (built-in) as the VPN provider from the field type drop-down menu.
How to fix the four biggest problems with VPN connections?
Other solutions you can try to fix a broken VPN are: Uninstall Citrix DNE Updater.
Install the Cisco VPN Tool
Setting up Hamachi correctly
Accept Microsoft CHAP version 2
Diagnosing and disconnecting a connection
Disable the AviraPhantomVPN service
Change system date and period
Remove VPN from your antivirus settings more often
Restart this service: LogMeIn Hamachi Tunneling Engine.
What is L2TP protocol and why use L2TP VPN?
L2TP Layer or 2 Tunneling Protocol is an extension of the PPP protocol that integrates the internal functions of the other two tunneling methods, PPTP and L2F, and is used to support virtual private circuits (VPNs). Since L2TP itself does not provide strong privacy or authentication, they are often implemented with any IPSec protocol to secure working relationships.
Can a Windows 10 VPN connect to a L2TP VPN?
After creating a VPN network connection using the l2tp protocol, you receive error code 809 when you try to connect to a remote website due to NAT issues. Windows 10 can connect to L2TP VPN and create a hack registry. There are two ways to do this: Registry Editor or Command Prompt. Our staff has listed instructions for both.
Douglas is a technology journalist and editor who has been covering the beat for over a decade. He has a passion for translating complex technology into easy-to-understand language for average consumers, and his work has been featured in some of the most well-known tech publications on the web, and he is a regular contributor to iconremover.com.