For more information on PROM values that you can set, see OpenBoot 2.x Command Reference Manual or OpenBoot 3.x Command Reference Manual.
In the terminal, enter the PROM security mode.
# eeprom security-mode=command Changing PROM password: New password: password Retype new password: password |
Choose the value command or full. See the eeprom(1M) man page for more details.
If you are not prompted to enter a PROM password, the system already has a PROM password. To change the PROM password, run the command:
# eeprom security-password=Return Changing PROM password: New password: password Retype new password: password |
The new PROM security mode and password are in effect immediately, but are most likely to be noticed at the next boot.
Do not forget this password. The hardware is unusable without it.
On Intel architecture, the equivalent to protecting the PROM is to protect the BIOS.
Refer to your machine's manuals for how to protect the BIOS.