On 18 May 2003, Mike Hicks wrote:

> Regarding this, one of the more unique tricks I've seen is to pretty
> much shutdown the system but keep the kernel running.  I'm not exactly
> sure how this is done, probably something along the lines of killing
> most of the running software and then convincing init to exec() a
> do-nothing program.  I think it's even possible to run without having a
> filesystem mounted (though it might be nice to at least have a logger of
> some kind running).

iirc this was a "feature" of the 2.2.x kernels... it would continue to 
route traffic and obey ipchains when it was in fact halted

if i also recall correctly the 2.4.x kernels did something differently in 
halted mode that it did not work

Munir Nassar


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