L2TP over IPSec for Remote Access is working fine as long as the NAT-T option is enabled in “Site-to-Site VPN” -> “Advanced”. But as soon as the NAT-T is disabled there, no remote access connection with a Windows XP client is possible. I can see the incoming connection in the IPSec log of the Astaro but it is not going over a certain point and the Windows XP client show a error 678 message.
Is this a usual behaviour?
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