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Setup and configure L2TP/IPSec-PSK VPN on Windows 10

Attention! In order to get L2TP/IPSec working correctly with Windows, it is necessary to make changes to the registry (add a parameter). This problem is listed on the official Microsoft website https://support.microsoft.com/en-us/kb/926179. This procedure will be described below in (1) of this manual. If you are not ready to make changes to the Windows registry, then you can set up VPN with PPTP protocol (see PPTP settings here), which not required the modification of the registry.

1. Making changes to the Windows registry (Administrative rights):
1) Run regedit with administrative privileges and locate the section HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent
2) Create DWORD (32 bit) parameter AssumeUDPEncapsulationContextOnSendRule and set value 2 for it.
Configure VPN L2TP/IPSec in Windows 10. Step 1.
3). Restart Windows!!!

2. After registry has been modified and computer was restarted, we can start to configure L2TP/IPSec connection. Click "Start" button and select "Settings" icon:

Configure VPN L2TP/IPSec in Windows 10. Step 2.


3. Click "Network & Internet":
Configure VPN L2TP/IPSec in Windows 10. Step 3.


4. Click "VPN":
Configure VPN L2TP/IPSec in Windows 10. Step 4.


5. Click "Add a VPN connection":
Configure VPN L2TP/IPSec in Windows 10. Step 5.


6. On the next page:
* in the list "VPN provider" select "Windows (built-in)"
* in the field "Connection name" print VPN-AdeoClouds
* in the field "Server name or address" enter given ip-address of your VPN server
* in the list "VPN type" select "L2TP/IPSec with pre-shared key"
* in the field "Pre-shared key" enter given IPSec pre-shared key
* in the list "Type of sign-in info" select "User name and password"
* in fields "User name (optional)" and "Password (optional)" enter given VPN user name (e-mail) and VPN password
* Check "Remember my sign-in info" checkbox and click "Save" button:
Configure VPN L2TP/IPSec in Windows 10. Step 6.


7. At this stage, a newly created connection VPN-AdeoClouds is ready, but network adapter is not yet configured. Do not connect now, please click "Change adapter options":
Configure VPN L2TP/IPSec in Windows 10. Step 7.


8. In context menu of a newly created connection VPN-AdeoClouds click "Properties":
Configure VPN L2TP/IPSec in Windows 10. Step 8.


9. Check again the given ip-address of your VPN-server on "General" tab:
Configure VPN L2TP/IPSec in Windows 10. Step 9.


10. Go to "Security" tab. Set Type of VPN as "Layer 2 Tunneling Protocol with IPsec (L2TP/IPSec)" and Data encryption as "Require encryption (disconnect if server declines)". Then check "Microsoft CHAP version 2 (MS-CHAP v2)" checkbox and click "ОК". Also close the previous "Network Connections" window:
Configure VPN L2TP/IPSec in Windows 10. Step 10.


11. Now everything is ready. You can connect to VPN server. To get connected please click "Connect" button in the window "Settings->Network & Internet". If buttons Connect, Advanced Options and Remove are not visible then click "VPN-AdeoClouds" to display them:
Configure VPN L2TP/IPSec in Windows 10. Step 11.


From now, after VPN-connection has already been created, it can be turned on/off from "Network" icon:
VPN turning ON/OFF in Windows 10.