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Tips To Protect Linux Servers Physical Console Access

Mar 19, 2009, 17:32 (0 Talkback[s])

[ Thanks to An Anonymous Reader for this link. ]

"Set BIOS Password
The BIOS is boot firmware, designed to be the first code run by a PC when powered on. It controls many important system parameters, including which devices the system will try to boot from, and in which order. Assign a password to prevent any unauthorized changes to the BIOS configuration. Reboot the server. Press special key like F2 (this key may vary from system to system). Go to BIOS configuration menu to add a password. Save and close the bios by pressing F10 (again key may vary)

"Set GRUB Boot Loader Password
By default popular Linux distro includes GRUB or Lilo as the default boot loader for x86 systems. GRUB can be used to select from different kernel images available on a particular operating system's partitions, as well as to pass boot-time parameters to kernels. It also allows to to boot from different partitions or media. GRUB can be used to by pass all security measurement (including authentication) using single-user mode. You must password protect GRUB from modifying the boot parameters and to improve server security. See how to set GRUB boot loader password using grub-md5-crypt command."

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