In VPN Windows, dialing is not allowed. How can this problem be solved?

So to ensure that you can use the L2TP VPN function provided by the TP-LINK TL-ER6110/6110 VPN router, you need to disable the Windows system's IPsec encryption policy for L2TP, you can disable the IPsec encryption policy for L2TP in Windows in either of the following ways:

1. Modify the registry: change the dword value of prohibiteIPsec to "1 ".

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesRasManParameters]

"ProhibitIpSec" = dword: 00000001

2, the use of TP-LINK modification tools:

1) select "disable IPSec encryption ".

2) click "OK" (some security software may prompt you to continue the operation during the operation. Please allow this operation ).

3) restart the computer to make the settings take effect.