Using Remote Access Concentrator Server Tools for Windows NT
Chapter 4 Using Security Features
4-6
PPP Security
Point-to-Point (PPP) provides a link between hosts that carry IP, IPX, and
ARA protocols. After PPP negotiates Link Control Protocol (LCP)
options, the hosts at either end of the link authenticate their identities
using PAP or CHAP security protocols.
•
PAP is a two-way handshake in which hosts exchange user
names and passwords in clear text.
•
CHAP is a three-way handshake that uses a secret token defined
in the acp_userinfo file to authenticate users.
▼
To configure Windows NT security for PPP links, you must set the
ppp_security_protocol parameter.
•
If you set ppp_security_protocol to pap, the system uses
Windows NT user names and passwords for authentication.
•
If you set ppp_security_protocol to chap–pap, the system first
requests CHAP security. If CHAP is not acknowledged, it
requests PAP.
CHAP does not authenticate Windows NT user names,
passwords, or remote access groups. It authenticates
based on user names from the acp_userinfo file and the
CHAP token.
▼
To log user access for PPP, set the slip_ppp_security parameter to
Y
.
If you want to set ppp_security_protocol and slip_ppp_security to
values other than the ones described here, the system will not use
Windows NT
user names and passwords for authentication.
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Страница 60: ...Using Remote Access Concentrator Server Tools for Windows NT Chapter 3 Understanding Erpcd 3 20 ...
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