Re: [exim] Problems mitigating joe job

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Szerző: Adrian Phillips
Dátum:  
Címzett: Ryan Thompson
CC: exim-users
Tárgy: Re: [exim] Problems mitigating joe job
>>>>> "Ryan" == Ryan Thompson <skcoyote@???> writes:

    Ryan> attacker sends out one of their batches, it is enough to run
    Ryan> my lightly loaded 1GB server out of swap within 3-4
    Ryan> minutes. (At which point I need remote hands to do a hard
    Ryan> boot, because ssh, login, etc. have been killed by the
    Ryan> kernel).


Assuming linux you'll need to change overcommit so running out of swap
space will cause jobs trying to allocate memory to get errors and not
cause jobs to be killed by the kernel. On a server, having overcommit
set incorrectly can be a killer.

Sincerely,

Adrian Phillips

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