bugtraq - Re: Strengthen OpenSSH security?

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Date: Wed, 19 Apr 2006 21:33:38 -0700
From: MaddHatter <maddhatt+bugtraq@....pdx.edu>
To: bugtraq@...urityfocus.com
Subject: Re: Strengthen OpenSSH security?

Brett Glass <brett@...iat.org> said (on 2006/04/17):
> To: bugtraq@...urityfocus.com
> From: Brett Glass <brett@...iat.org>
> Subject: Strengthen OpenSSH security?
>
> ...
> It seems to me that sshd should not tip its hand by returning
> different responses ...

I agree. I also wish OpenSSH would implement the same security measures
already available in other SSH servers and authentication products --
a dynamic black list. The idea is simple, but effective: connections
from IP addresses that have failed to authenticate X times in the last
Y minutes are refused for Z minutes. For adequate values of Y and Z,
brute force attacks quickly lose feasibility.