From: Erek Adams (ereksnort.org)
Date: Sun Jul 06 2003 - 01:12:20 CDT

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On Sat, 5 Jul 2003 briankdsonic.net wrote:

> I'm setting up an Apache/PHP web server behind my DSL router, and setting
> the router to only forward ports 80 and 22 to the server. I'm concerned
> about potential intrusions, but I feel like I've covered a lot of the
> potential exposures by using the port-forwarding scenario.

Some. Be cautious and don't let that fool you into a false sense of
security.

> I followed the recipe at
> http://www.internetsecurityguru.com/documents/snort_acid_rh9.pdf to set
> Snort/PHP/Acid up on this web server. Is there a way I can determine
> which rules & preprocessors are the only ones necessary to protect against
> intrusion on those two ports?

stream4, converstation, http_decode for sure. Rules? Well, any that deal
with web applications (rules/web*) or that have port 22 in them. A
simple:

        egrep -i " 22 |ssh" rules/*.rules

Should snag most of them.

Cheers!

-----
Erek Adams

   "When things get weird, the weird turn pro." H.S. Thompson

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