Len,

We're considering the IMGate system and was wondering how does the software
actually know that a possible dictionary attack is taking place?  We do
operate various list and corporate mailings.  Does the IMGate software just
block ip's that tries too many AUTH attempts?

Thanks,

~Rick

>
> >Does anyone knows a good way to prevent dictionary attacks?
>
> For defenses on the Imail server, the very high volume attacks will still
> seriously exhaust the Imiail machine's resources unless you have tons of
> spare capacity  and result in a denial of probably significant level of
> service anyway.
>
> An filtering SMTP proxy like IMGate will block the attack whilte
sustaining
> very high volume attacks and still provide service.
>
> The advanced IMGate config detects attacks in a minute or two and
firewalls
> the attacking ip's.
>
> Len


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