Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1986-2001 Microsoft Corp. C:\WINDOWS>netsh ras add authtype ?
add authtype [type = ] PAP|SPAP|MD5CHAP|MSCHAP|MSCHAPv2|EAP
Selects the types of authentication which this RAS server will
attempt to negotiate. Negotiation will be in the order most-secure to
least-secure. Once both client and server agree upon an authentication
type, the PPP negotiation will follow the appropriate RFCs.
type - the type
PAP - Password Authentication Protocol (clear text).
SPAP - Shiva Password Authentication Protocol.
MD5CHAP - Challenge Handshake Authentication Protocol using
Message Digest 5 hashing scheme to encrypt the response.
MSCHAP - Microsoft Challenge-Handshake Authentication Protocol.
MSCHAPv2 - Version 2 of MSCHAP.
EAP - Extensible Authentication Protocol.
