Lantronix MPS100 Przewodnik Instalacji Pobierz pdf (Strona 56)

Security Ports

5-6

5.3.2 Preventing Access Until DSR Is Asserted

The Signal Check characteristic can be used to prevent remote connections to a port unless DSR is asserted.

This is often used to prevent Telnet logins to a port until the device attached to the port (for example, a

terminal) asserts the DSR signal, indicating that it is connected and powered on.

Figure 5-14: Enabling Signal Check

5.3.3 Automatic Logouts

Ports can be configured to log out automatically when the DSR signal is dropped. Ports can also be

configured to log out automatically or when they’ve been inactive for a specified period of time.

5.3.3.1 DSRlogout

When a device connected to the Server is disconnected or powered off, the DSR signal is dropped. To

configure a port to log out when this happens, use the Set/Define Port DSRlogout command.

Figure 5-15: Enabling Dsrlogout

Normally, DSR must be enabled on a port for it to automatically log out when the device it is attached to is

turned off or disconnected. When DSRlogout is enabled, the Server will log out the port’s user if either of

these cases occurs.

5.3.3.2 Inactivity Logout

To configure a port to log out after a specified period of inactivity, use the Set/Define Port Inactivity

Logout command. This command works in conjunction with the Set/Define Server Inactivity Timer

command, which defines an inactivity limit as a particular number of minutes. After the timer period has

elapsed, a port with Inactivity Logout enabled will be considered inactive and automatically logged out.

Figure 5-16: Enabling Inactivity Logout

Local>> DEFINE PORT 3 SIGNAL CHECK ENABLED

Local>> DEFINE PORT 1 DSRLOGOUT ENABLED

Local>> DEFINE PORT 1 INACTIVITY LOGOUT ENABLED

Local>> DEFINE SERVER INACTIVITY TIMER 500

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 222 223

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Lantronix MPS100 Przewodnik Instalacji Strona 56