| From: | Marko Kreen <markokr(at)gmail(dot)com> |
|---|---|
| To: | David Wilson <david(dot)t(dot)wilson(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, toruvinn <toruvinn(at)lain(dot)pl>, pgsql-bugs(at)postgresql(dot)org, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: [PERFORM] BUG #4919: CREATE USER command slows down system performance |
| Date: | 2009-07-15 15:31:25 |
| Message-ID: | e51f66da0907150831p1432de8cv378d33bf34633aec@mail.gmail.com |
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| Lists: | pgsql-bugs pgsql-performance |
On 7/15/09, David Wilson <david(dot)t(dot)wilson(at)gmail(dot)com> wrote:
> On Wed, Jul 15, 2009 at 11:10 AM, Marko Kreen<markokr(at)gmail(dot)com> wrote:
> > From security standpoint, wasting more cycles on bad passwords is good,
> > as it decreases the rate bruteforce password scanning can happen.
> >
> > And I cannot imagine a scenario where performance on invalid logins
> > can be relevant..
>
>
> DoS attacks. The longer it takes to reject an invalid login, the fewer
> invalid login attempts it takes to DoS the server.
No, this is not a good argument against it. Especially if you consider
that DoS via hanging-connect or SSL is still there.
Compared to minor DoS, the password-leakage is much worse danger.
--
marko
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