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Bugtraq archives for 2nd quarter (Apr-Jun) 1996: Re: Write-only devices (Was read only devices)

Re: Write-only devices (Was read only devices)

Gary Howland (garysystemics.com)
Mon, 24 Jun 1996 12:09:05 +0200 

Don Lewis wrote:
>
> On Jun 21,  4:40pm, Paul C Leyland wrote:
> } Subject: Write-only devices (Was read only devices)
> } I do not know of any readily available write-only output device other
> } than printers these days.  There were advantages to paper tape and
> } punched cards which we have since lost.
>
> I think that if you substitute a cheap PC reading from its serial port
> and writing to the medium of your choice for a serially connected
> printer it will meet your criteria.  The PC's serial and power
> connections should be its only connections to the outside world.  The
> host writing the logs is not able to read the data back from the PC and
> is not able to overwrite an previously written log entries.  What would
> be cool is if the PC hooked to something like a floppy disk duplicator.
> As the floppies were filled, they would be ejected and new blank floppies
> would be loaded.  The filled floppies could be physically write protected
> after they were ejected.

Or even a PC on the local lan with it's TX line cut?
That way no one will know it is there, but all (well, most, if using
UDP) log messages in the form of UDP packets could be logged.

Gary
--
pub  1024/C001D00D 1996/01/22  Gary Howland <garysystemics.com>
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