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1986-09-09
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Here are two memory resident utilities to protect yourself from being
Trojaned from Hackers. These two files have been in full use on both
InfoLink Network and LaserNET PCBoards. Please feel free to pass these
two files along with this document to other BBS operators. Thanks,
Tim Conner (Sysop, InfoLink/LaserNET Systems).
WPHD.COM - Run this to write- and format-protect your hard disk. Useful
when letting someone else use your PC or when trying out
new BBS software. Each time it is run it
toggles the protection off or on - no need to reboot to get
rid of it. The toggle ON/OFF feature will not work if, after
running WPHD, you run another RESIDENT program that
re-vectors INT 13. In other words, run WPHD after running
other resident programs, such as Sidekick.
If the DOS FORMAT command is run when this is on, it will
appear to be formatting your hard disk, but what it is
actually doing is VERIFYing each sector, which does not
harm the disk. Your data is actually lost during a format
when DOS writes a new Directory and FAT - WPHD will prevent
that. Actually, if WPHD is not installed and you accidentally
start formatting your hard disk, you can type Ctrl-Break
to stop the formatting. The Ctrl-Break will not be
acknowledged right away, but that's ok - it will still break
you out of format before any damage is done.
FPHD.COM - This program will protect your hard disk against an
accidental FORMAT, but will still allow writing to the
disk. It is toggled on and off in the same way that WPHD is.
The line FPHD should be put in your AUTOEXEC.BAT file.
Remember though that if someone reboots your system from
the "A" drive, this protection will be gone. But see the
discussion above; if you hit Ctrl-Break before the very end of
the formatting, you will save your hard disk.
** NOTE ** To All users of DoubleDOS, Please set these two files within
your AUTOEXEC.BAT file prior to loading PCBoard!
All comments/problems can be directed to me via InfoLink/LaserNET board.