Linux.com: LILO Security Tips

There are several techniques to minimize the risk of
passing LILO arguments at boot time and booting the system in
single user mode to get the root shell.

This controls how long (in tenths of seconds) LILO waits for user
input before booting to the default selection. It should be set to
0 unless the system dual boots something else.”

This forces the user to enter something, LILO will not boot the
system automatically. This will not reboot the server without a
human attendant. But, If you add a timeout option then the system
will continue booting after the timeout is reached.”