[Snort-users] Snort - VPS web server (Debian)

Martin Holste mcholste at ...11827...
Mon Aug 29 12:45:54 EDT 2011


config detection: search-method ac-bnfa-q split-any-any
I'm not sure if lowmem actually has lower memory than ac-bnfa, anyone
care to confirm?

On Mon, Aug 29, 2011 at 10:41 AM, johnny.venter <johnny.venter at ...15370...> wrote:
> Could you elaborate on using the "lightest memory setting for the fast pattern matcher"?
>
> ---- On Sun, 28 Aug 2011 12:00:54 -0700 Martin Holste<mcholste at ...14542....> wrote ----
>
>  > On such a small server and with such a specific use, I'm not sure
>  > running Snort is the right tool for the job.  I think mod_security
>  > with centralized logging would be a better fit, especially since it's
>  > serving mostly static content.  That said, Snort should run ok, but
>  > make sure you use the lightest memory setting for the fast pattern
>  > matcher, and most importantly, that you only run signatures applicable
>  > to the services it runs.  When you've done all that, what you'll end
>  > up with is a system that will create alerts when it notices generic
>  > web attacks and high-level HTTP violations, like the Apache range
>  > vulnerability of late.  All of this will be less specific and more
>  > resource-intensive than mod_security, which is why I recommend that
>  > you just start with that to begin with.
>  >
>  > On Sun, Aug 28, 2011 at 12:26 PM, Johnny Venter <Johnny.Venter at ...15052...370...> wrote:
>  > > Hello,
>  > >
>  > > I am looking for guidance/advice.
>  > >
>  > > I have a VPS server that is running Debian with Lighttpd and sendmail.  The memory is 256MB and the HD space is 10GB.
>  > >
>  > > The website I have is very light and mainly static content.
>  > >
>  > > Currently, I have iptables installed that permits port 80/443 inbound.
>  > >
>  > > I would like to install Snort on this VPS in IPS mode without bringing my system to a crawl.  I assume I can disable the preprocessors that I will not need.  So I can just enable the web preprocessors?
>  > >
>  > > Is this correct and can someone add input if they have completed the same project before?
>  > >
>  > >
>  > > Thanks, Johnny
>  > >
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