Specifics of connecting to the router's PPTP server from Windows

In the PPTP server on your Keenetic router, by default, the MPPE protocol works with a 40-bit key. Under Windows 7/8/10 OS, the MPPE protocol uses a 128-bit key by default for PPTP connections; that is why you may experience difficulties connecting to Keenetic's PPTP server.

In this case, we can offer you two options: setting up your router or additional adjustment of your Windows operating system.

Option 1: Configure the router to enable the use of a 128-bit key. This setting must be done via the command-line interface (CLI) of the router. Connect to the CLI and execute the following commands:

vpn-server mppe 128     /to enable 128-bit key for MPPE/
system configuration save     /to save changes/
exit    /to exit the command-line interface/

To return to the default settings, run the commands: 

vpn-server mppe 40
system configuration save


vpn-server no mppe 128 
system configuration save


Option 2. In Windows 7/8/10, you can enable the 40-bit key support for the MPPE protocol. This can be done using the Registry Editor (Regedit).

NOTE: Important! Registry Editor is a tool for advanced users only. It is designed to view and modify settings in the Windows Registry that contain information about your computer's operation.

Modifying the registry incorrectly can cause serious problems, so follow the steps below carefully. For added protection, it is advisable to back up the registry before editing it, which will allow you to restore the Windows Registry if problems occur.

To run the Registry Editor in Windows 7/8/10, press Win + R, type regedit and click OK.

Go to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Rasman\Parameters, find the "AllowPPTPWeakCrypto" parameter, double-click on it to change the parameter and set "1" instead of "0" in the "Value" field (hexadecimal must be used!). Then click OK and exit the Registry Editor.


NOTE: Important! After editing the registry, the operating system must be restarted for the changes to take effect.

Article on setting up the Keenetic router's built-in PPTP VPN server: PPTP VPN server.


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