TMS module & Windows 7 L2TP/IPSEC VPN client

[Mazzz86]

Hi,

I've set up a L2TP/IPSEC VPN on the TMS module with a preshared-key.

The TMS module has a public static IP address.

I've no problem when I configure a windows XP client or a Windows 7 one with public IP address. The VPN is up and running like a charm.

But when I connect my client behind a NAT device, only the Windows XP works correctly.

When I try to connect from my Windows 7, I get a 809 error.

On the TMS log, i get a "SPI = 0x25ca149d, Seq. No = 2 :: SA selectors are not matching with the received packet selectors. Dropping the packet" message.

I tried almost everything i found on the internet. I can't figure out what the problem is.

Maybe someone can help me.

Thank's in advance.