enable/disalbe MPPE 128-bit encryption

[Guest]

Hi

Over ISDN (PPP, MS-CHAPv2) a Linux-PC connects to my XP-System. Normally, a
128-bit MPPE encryption was used.

But since few days, the MPPE encryption seems to be disabled. No MPPE
encryption is used. The only thing I have changed is the option "allow
calling computer to specify ist own IP address" (Incoming Connections
Properties / Incoming TCP/IP Properties)!! Now I changed the option again and
again, but MPPE 128-bit was never applied!

Where can I configure my encryption? What's my fault?

Thanks

Armin

 

[Steven L Umbach]

How do you know that it is not being used? Is any encryption shown as being
used? Does this happen if another Windows computer connects via VPN?

Steve

 

[Guest]

If there is a connection, under <network connections> the connected ISDN-line
is listed. If MPPE was used, there was an entry <MPPE 128 encrypted>. Now,
it's no entry about encryption.

It's no difference whether the calling pc is a Windows computer or a Linux
computer.

 

[Steven L Umbach]

Weird. You might want to try deleting the current VPN connection on the XP
Pro computer and creating a new one to see if it makes a difference or not.
Also check the logs via Event Viewer to see if there are any warning/errors
that are logged at the time the VPN client connects that may help.

Steve