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Managing Access Server Security 22-35
Managing Dial-Up Access Security with AUTOLINK and AUTOLINK Authentication
Timeouts
The following are the properties of AUTOLINK timeouts:
• A user has one minute to complete an interactive login successfully. The clock
starts from the time the USERNAME> prompt is displayed. This includes the time
for the user name/password request to be processed by the authentication server.
After one minute elapses, the port is logged out and the modem is disconnected.
• When a terminal emulation window first appears, it is blank. Entering a carriage
return produces a USERNAME > prompt. If you do not enter a carriage return, the
prompt is displayed after a user-set timeout (AUTOLINK PASS ONE). At this
point the one minute time limit is initiated.
• If a user authenticates successfully in a terminal window (or a script), a single
carriage return or a lapse of a user-set timeout (AUTOLINK PASS TWO)
produces a local prompt. The user or the script can enter C PPP or C SLIP to begin
framed operation.
Using a Login Script
If you use a login script on the remote client, your script must include the following:
Stage Description
1
The script must send a carriage return character. Alternatively, the
script can send
no
characters for [AUTOLINK TIMER PASS ONE]
seconds (note that this is not the preferred method).
2
The script searches for
Username>
and responds with the user’s user
name and a carriage return.
3
The script searches for
Password>
and responds with the user’s
password and a carriage return.
4
The script searches for:
Local -451- Authentication successful
5
The script exits and allows the framed protocol to run. Note that the
key phrase to search for is “Authentication successful”.