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ACS 3.3 Microsoft VPN encryption error


I have a ACS server configure with radius and another Windows 2003 server hosting VPN (RAS) PPTP . ACS Group have the microsoft attritubes (encryption require, 128 bits, MPPE-Keys). When I try to connect using the PPTP client on WinXP, I receive the error 742 saying that the encryption it not good on the server. Strange because on the ACS server I have already install the VPN from microsoft and when the client connect, it's OK. Now I need a second server for our site and it's not working. The only way it can connect is to uncheck the box that ask to require encryption (properties of the PPTP conenction, security tab).

Someone have an idea ? Thank for your reply

New Member

Re: ACS 3.3 Microsoft VPN encryption error

I found the answer to my problem. For my AAA client I was configure with Radius (IETF). This type of radius does not send the Microsoft Radius parameter. You have to use Radius of IOS/PIX, Cisco VPN 3000 or Ascend. Now the encryption pass from radius to the client which use 128 bits (strong encryption).

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