[pptp-server] Encrypted sessions using NTS Tunnel Builder

[Landy Manderson]

I've been running PoPToP 1.0 for a few weeks, and successfully connecting
in with Windows 9x and all of the appropriate patches.  Now, we are trying
out NTS Tunnel Builder so that our Mac clients will be able to connect also.
The problem I'm having is that the session will connect but not pass traffic
if encryption is selected.  This is the case for both the PC and Mac versions
of Tunnel Builder.  It is requesting 40-bit stateless encryption, and the
log shows that all packets after this is negotiated are essentially garbled.
It is almost as if the two ends do not agree on how to perform or initialize
the encryption.

So I guess my question is, is anyone using a similar configuration with
success?  Is there anything obvious which I could've overlooked?  I would
think I have one of the patches installed incorrectly if the M$ VPN adapter
didn't work flawlessly when it requests the very same encryption.