<HTML ><HEAD ><TITLE >Use a boot loader password</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Remote Serial Console HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Security" HREF="security.html"><LINK REL="PREVIOUS" TITLE="BIOS features" HREF="security-bios.html"><LINK REL="NEXT" TITLE="Non-interactive boot sequence" HREF="security-rhl-prompt.html"></HEAD ><BODY CLASS="SECTION" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Remote Serial Console HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="security-bios.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 9. Security</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="security-rhl-prompt.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECTION" ><H1 CLASS="SECTION" ><A NAME="SECURITY-BOOTLOADER" ></A >9.7. Use a boot loader password</H1 ><P >Configure the boot loader to request a password when booting a non-default image or when supplying parameters from the command line.</P ><P >This prevents someone from dialing in during the boot sequence and booting the kernel with options to take control of the machine, as in <A HREF="configure-boot-loader-lilo.html#CONFIGURE-BOOT-LOADER-LILO-HACK" >Example 4-1</A >.</P ><P >The password should not be the same as the <SPAN CLASS="ACRONYM" >BIOS</SPAN > or <SPAN CLASS="SYSTEMITEM" >root</SPAN > passwords.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="security-bios.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="security-rhl-prompt.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="ACRONYM" >BIOS</SPAN > features</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="security.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Non-interactive boot sequence</TD ></TR ></TABLE ></DIV ></BODY ></HTML >