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Chapter 12

12 - 14

Forcing a serial terminal to be the console

In the case where you have not yet connected the serial terminal or it is not

active when the BIG-IP is booted, as it might be if you are using a terminal

server or dial-up modem, you can force the controller to use the serial

terminal as a console. Note that you do not need to disconnect the keyboard

if you use this procedure to force the serial line to be the console.

To force a serial terminal to be the console

1. Edit the /etc/boot.default file.

Find the entry -console auto. Change this entry to -console com.

2. Save the /etc/boot.default file and exit the editor.

3. Plug the serial terminal into the serial port on the BIG-IP.

4. Turn on the serial terminal.

5. Reboot the BIG-IP.

Once you configure a serial terminal as the console for the BIG-IP, the

following conditions apply:

Keyboard/monitor access is disabled, and logging in is only possible via

Secure Telnet (SSH), if configured, or the serial line.

If the boot.default file is corrupted, the system does not boot at all. Save a

backup copy of the original file and keep a bootable CD-ROM on hand.

The boot.default file must contain either the line: -console com or the line:

-console auto. Do not configure both settings. This could cause problems

when you attempt to boot the system.

Configuring RADIUS or LDAP authentication

You can configure the BIG-IP to use a RADIUS or LDAP server on your

network to authenticate users attempting to access the controller with SSH.

In this configuration, the RADIUS or LDAP server can function as a central

repository of users that are allowed access to the BIG-IP for administrative

purposes.

To configure RADIUS login support

Follow these steps to enable RADIUS authentication on BIG-IP.

1. Create the directory /etc/raddb.

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Dell 3-DNS Spezifikationen Seite 388