1. You can establish a connection using one of VPN protocols. For example, for L2TP/IPsec please choose "L2TP/IPSec" from the dropdown list.

2. Choose a VPN server from the list of available nodes, and click "use".

3. Copy Server / Gateway, Username, and Password data from the panel and paste it into the new VPN connection form on your PC. You can find it by accessing Settings -> Network settings -> VPN -> Add a VPN connection.

4. VPN provider: Windows, Connection name: L2TPTest, Server name or address: vpn.dslrentals.com, VPN type: L2TP/IPSec with pre-shared key, Type of sign-in info: User name and password, User name: Username from panel, Password: password from panel, Remember my sign-in info -> Save.

6. Restart PC, select your created VPN connection and click "Connect".

5. Registry modification:
open the Registry Editor, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent, and then add or modify a DWORD value named AssumeUDPEncapsulationContextOnSendRule with a value of 2.

You can also open "cmd" (under Administrator) and run the following command to make changes to the registry:

reg add "HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent" /v AssumeUDPEncapsulationContextOnSendRule /t REG_DWORD /d 2 /f