Hello everyone,

i try to build a VPN with L2TP IPsec for windows and linux clients. But on phase 2 of the connection it failed.

I tried the connection from windows 10 client

Here is the log:

respond new phase 1 (Identity Protection): 2a00:.......[500]<=>2a00:........[500]
ISAKMP-SA established 2a00:......[500]-2a00:.......[500] spi:201492....:5a147b68........
2a00:....... failed to pre-process ph2 packet.

Could someone give me a hint, what the problem can be?

Thanks a lot
Stikkx

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