Specifications

23-33
Managing Access Server Security
Managing Dial-Up Access Security with AUTOLINK
and AUTOLINK Authentication
Introduction
AUTOLINK lets PC clients log in using SLIP, PPP, and character cell terminal
mode.
AUTOLINK AUTHENTICATION provides a flexible and secure method for
clients to authenticate when using AUTOLINK. A single port can support
authenticated logins from different types of PPP clients, which may have different
LCP authentication capabilities. For SLIP or PPP clients that do not support PAP
or CHAP authentication, an interactive or script-based login will be used. When
you enable AUTOLINK AUTHENTICATION, only one form of authentication is
required during any port login.
When you use AUTOLINK authentication, a successful user login requires a user
name/password authentication. The user name/password authentication
requirement is independent of how you configure port characteristics (PORT
AUTHENTICATION and LCP AUTHENTICATION).
To use AUTOLINK authentication, you need to set the DEFAULT PROTOCOL
and DEDICATED SERVICE for the port to use the AUTOLINK protocol, and then
enable the AUTOLINK AUTHENTICATION port characteristic.
Activating AUTOLINK
The port begins the AUTOLINK search protocol when the port has begun its login
process. AUTOLINK examines the characters arriving on the port and determines
if a PC is using PPP, SLIP, or a character-cell terminal emulation (which may be a
login script).
If AUTOLINK does not detect a PPP or SLIP start frame character within a user-
set timeout, it chooses character-cell mode. Note that a user or the login script can
expedite the choice of character-cell mode by entering a carriage return character.
Example: Configuring the Port
The following example shows how to set the port’s default protocol and
dedicated service to AUTOLINK:
Local> DEFINE PORT DEFAULT PROTOCOL AUTOLINK
Local> DEFINE PORT DEDICATED SERVICE AUTOLINK