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Date: Mon, 20 Jul 2015 10:24:08 +0200
From: Dirk-Willem van Gulik <>
To: Reed Loden <>
Cc: "" <>
Subject: Re: [FD] OpenSSH keyboard-interactive authentication brute force
	vulnerability (MaxAuthTries bypass)

> On 18 Jul 2015, at 23:23, Reed Loden <> wrote:
> On Friday, July 17, 2015, <> wrote:
>> Do you know if this is still affected if you have fail2ban in place.
>> Fail2ban uses the auth logs to monitor failed password attempts. I
>> assume that the auth log is still updated even if x number of attempts
>> is allowed. Thanks
> goes over this question pretty well, so as not to rehash everything.

Arguably the question then should be to have a MaxChallengeTries as an analog of MaxAuthTries - and perhaps by default
set MaxChallengeTries to the same (sane) value of MaxAuthTries.


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