Enterasys Networks CSX6000, CSX5500, CSX7000 manual Data Timeout Value

USER’S GUIDE

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.

DATA TIMEOUT VALUE

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.

TERMINAL SERVER SECURITY

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.

BACKGROUND INFORMATION

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.

394 CyberSWITCH