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OSX Server L2TP from Windows 7 VPN

A how-to for connecting to a VPN server running on Mac OSX Server using L2TP.

HKLM\SYSTEM\CurrentControlSet\Services\PolicyAgent
+ DWORD (32-bit)
  AssumeUDPEncapsulationContextOnSendRule 
I set mine to '2' (NAT on both sides)

Setup the VPN connection on the Windows 7 client
Properties | Security
Type of VPN: Layer 2 Tunneling Protocol with IPsec (L2TP/IPSec)

Click Advanced Settings 
update "Use preshared key for authentication"

Data Encryption
I selected "Optional encryption (connect even if no encryption)

Feel free to attempt to not use some of the options, but the above works with Windows 7 client and OS X VPN L2TP server.
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