Windows 10 connecting to an L2TP VPN Server that is behind a NAT

If you are on Windows 10 and are trying to connect to an L2TP server behind a NAT, then you will find that it will not work due to how Microsoft has set up their IP stack. If you are on a Mac then it will work ok, but not on any version of Windows and a change is needed in the registry according to the below link:

[pyrettablaze]

I rarely comment on Youtube Videos, but this four-year-old Video solved a problem I spent days on in 3 minutes. lol. Even with the L2TP ports open on my router, I couldn't connect to my VPN and this registry setting solved it immediately. Thanks for posting!

[linkz]

I cannot thank you enough, i had forgot this step thanks to your video i remember it now. God Bless!!

[henrykopa]

Thank you very much. This has solved my problem after spending so much of time on internet trying to find an answer.

[mohammadimran]

i am facing this error when i am connecting VPN. The remote connection was not made because the attempted vpn tunnels failed.
the vpn server might be unreachable. if this connection is attempting to use an L2TP/IPsec tunnel, the security parameters required for IPsec negotiation might not be configured properly

[andrebunting]

this doesnt work for me the same error still comes up... any other ideas?

[carlosalexanderrodriguezza]

yo nunca nunca comento en youtube, pero me salvaste la vida, mas ahora en esta pandemia del coronavirus mis vpn's ya funcionan, te amo...

[andrasszeiner]

I I tried all the options but I still get the same error messages when I want to connect to the VPN :(. I havent got idea what can I do now :(

[adrianchatto]

Thank you my friend. That worked for me. Why on earth do MS do this? Why not at least a tick box (are you NAT'ed)?

[Badi]

Hi, do you have an idea after I did everything the computer did not turn on? it's only a black screen

[_-_ttt_-_]

Is value 2 universal? I mean will it work when only my server is behind the NAT and client isn't?

[rayanvarghese]

What to do for 64bit OS ?? This didnt work for me sadly

[theAboodNet]

I tried this on windows 8.1 but i still get the same error. Any help guys?

[RicardoWagner]

this doesent work with windows 10 64 bit

[Fleacila]

OMG I was fucking trying for 3 day now and you made it work THANK YOU I'M MEAN IT

[melodydesabille]

In my case, it says my VPN is not configured to allow GRE protocol packets. Is your tricks solve this problem?Appreciate your help. thank you

[yuyud]

Thank You Very Much. You Saved Me From Lag

[frowningtap]

what a guy, banging my head for hours, windows is such trash STILL

[PeakyBlinder]

what about windows 10 64bit ? as this didnt work on a 64bit os ? im going to try it with a qword 65

[UnknownNobody]

Didn't work for me (I think it's because my router is no letting me open 1723 port for my VPN or else, it would've worked, I think) but thanks for the video anyways. I appreciate the effort.

[KLNYC]

damn i did exactly same thing . no good didnt work.