[ale] SSH attempts

[Erik Mathis]

I have to disagree with you on this, as you are only concerned about
ssh. Since the remote box is most likely owned, ssh brute force
attacks is likely only going to be the first wave of hate coming from
that IP. Its best to me to just take a scorched earth approached in
these situations. Every three months or so, you can remove the ACL
(how ever you end up blocking) and see if it the hate comes back. Auto
add rules should take care of the rest. In other words, its best to be
prudent and proactive now, then later when your stuff is hacked and
your only left with reactive options.

-Erik-

On Mon, Sep 12, 2011 at 12:36 PM, Michael H. Warfield <mhw at wittsend.com> wrote:
> On Mon, 2011-09-12 at 11:59 -0400, Erik Mathis wrote:
>> Use denyhosts. Simple and really easy to use.
>
>> On Mon, Sep 12, 2011 at 11:05 AM, David Hillman <hillmands at gmail.com> wrote:
>> > According to the PortSentry logs for my server, I have received thousands of
>> > connection attempts via SSH port 22.  Of course, that is not the port the
>> > real SSH service is listening on. Logins were also disabled for root.
>> > What's interesting is the IP addresses all belong to Serverloft
>> > (www.serverloft.eu); most attempts came from 188.138.32.16
>> > (loft4385.serverloft.eu).  I am guessing someone with a few VPS boxes has
>> > nothing better to do than use up network bandwidth to terrorize the rest of
>> > us.  Or, maybe those boxes have been compromised.
>> > I have e-mailed the folks over over at Serverloft, but I don't expect
>> > anything of it.  Is there anything else I can do?
>
> Hold the phone here!
>
> You guys are trying to over engineer this.  Read what the OP wrote.
>
> He's got ssh running on a different port already.  fail2ban and
> denyhosts will do nothing that port sentry (and I'm assuming that's the
> old Abacus Port Sentry) and simple firewall rules won't do.  All he's
> seeing is connection ATTEMPTS.  There's nothing there to connect to so
> all he's seeing is Port Sentry logging noise.  You've got it blocked
> already and the service isn't running there anyways.  You don't want the
> noise, stop logging it.  That's all.  You can't stop the attempts.  But
> the attempts don't result in any connections.  Nothing more to do.  Move
> on.
>
> Mike
> --
> Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
>   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
>   NIC whois: MHW9          | An optimist believes we live in the best of all
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>
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