I have been using this solution on my Win 8.1
After updating to Windows 10 it is not working any more.
Is there a work around for it?
I've managed to make my two windows 10 (64bit pro) installations connect to l2tp behind nat, using the mentioned registry key with value 2.
I went into regedit, changed the key to 1, rebooted, changed the key back to 2, rebooted and now I can use VPN via l2tp again.
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