Enterasys Networks CSX6000 - Manual (Page 394)

USER’S GUIDE
394 CyberSWITCH
If no data is received within the data timeout duration, the following events will occur:
•
If Disconnect is configured, the CyberSWITCH will disconnect the call.
• If Use PPP Protocol is configured, the CyberSWITCH will assign the call to a PPP subsystem.
• If Use Terminal Mode is configured, the CyberSWITCH will assign the call to the terminal I/O
subsystem and/or the user-level authentication server.
D ATA T IMEOUT V ALUE
Determines how long (in seconds) the CyberSWITCH will wait to receive data during autosense
mode. If the configured time expires, the CyberSWITCH will take configured action for the
connection. The minimum value is 1 second; the maximum value is 60 seconds. The default is 30
seconds.
Note: This timer starts at the beginning of a call and includes the time for the modems to
negotiate (typically 10-12 seconds). Be sure to allow for this additional time to avoid the
Action on Data Timeout before negotiation is completed.
After terminal-user authentication, this timer restarts. The CyberSWITCH returns to
autosense mode again and if no data received, the user will need to reauthenticate.
T ERMINAL S ERVER S ECURITY
Specifies which type of user-level authentication server to use for terminal mode connections. The
selections are: RADIUS, TACACS, ACE, Use Administrative Login or Do not allow terminal access. The
Use Administrative Login value will present terminal users with a normal CyberSWITCH admin
login prompt. The Do not allow... value will not permit terminal access upon data timeout and will
disconnect the call. The default is Do not allow terminal access.
B ACKGROUND I NFORMATION
This feature supports the ability to handle terminal mode connections via dial-up client software
packages, such as WIN95 Dial-up Networking. Terminal mode connections are useful for
authenticating remote modem users via user-level authentication, then providing PPP protocol
data communications. It also provides a means of system management using a remote console. For
X.25 users, it provides remote modem users a means of access to different X.25 services.
When an incoming connection is established to the CyberSWITCH, system software autosenses the
type of connection. The system looks at the first few bytes of received data and determines whether
the connection is terminal mode or PPP mode. If no data is received within a configurable amount
of time, the system takes action based on one of the following configured parameters:
•
PPP Mode: normal CyberSWITCH authentication and data forwarding procedures apply to this
connection
• Terminal Mode: connection processed by CyberSWITCH I/O subsystem which handles charac-
ter-oriented data. Connection assigned to user-level authentication task. Authentication pro-
cess proceeds per configured user-level authentication parameters and method of operation.
If authentication fails, the connection is released as per the configured authentication
parameters.
If authentication succeeds, the authentication task completes its functions such as displaying
the message of the day. Once authenticated, control passes to a PPP subsystem and the
connection enters PPP mode. Device-level authentication and protocol stream handling
proceeds per configured device information.