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