limit number of ssh connections
mr.festin at yandex.ru
Mon Sep 19 20:12:10 UTC 2011
Standard inetd(8) has many options including limiting connections based on IP-address. Can it help in this case?
20.09.2011, 00:02, "James Strother" <jstrother9109 at gmail.com>:
> That's an interesting project, I hadn't realized port knocking had
> become so easy to use.
> Unfortunately, for this particular server, I need to be able to
> provide a simple way for (a very limited number of) users to login
> into the system remotely using a variety of OS platforms. So I don't
> think port knocking is a good fit here.
> 2011/9/19 Григорьев Александр <mr.festin at yandex.ru>:
>> If your target is protect freebsd box from bruting passwords from inet maybe security/knockd will help you?
>> 19.09.2011, 23:05, "James Strother" <jstrother9109 at gmail.com>:
>>> Does anyone know a good way of limiting the number of ssh attempts
>>> from a single IP address?
>>> I found the following website, which describes a variety of approaches:
>>> But I am honestly not really happy with any of them. Continuously
>>> polling log files for regex hits seems...well crude. Just to give you
>>> an idea of what I mean, here were some of the issues I had. The
>>> sshd-scan.sh script allows IPs to be reinstated, but the timing is
>>> dependent on how frequently you rotate logs. sshguard has a pretty
>>> website, but I can't actually find much useful documentation on how to
>>> configure it. fail2ban looks like it might work with sufficient work,
>>> but the defaults are terrible. By default, every time an IP is
>>> reinstated, all IPs are reinstated. Not to mention, at present I
>>> can't seem to get it to trigger any hits.
>>> I suppose I could keep shopping, but the truth is I just think polling
>>> log files is the wrong way to solve the problem. Anything based on
>>> this approach is going to have a long latency and be highly dependent
>>> on the unspecified and unstable formatting of log files (see
>>> and the troubles an exclamation point can cause).
>>> I would much much rather do something like this:
>>> Does anyone know a way to do something similar with ipfw?
>>> Thanks in advance,
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