RE: Firewall rulebase automation - Grey Box assessment



I agree to Chris. Had an opportunity to test CP-VSX and NetScreen both
on high speed networks and to my dismay many things do not function as
configured and expected. Specially when the firewalls are under heavy
traffic.

For true test on whats allowed and whats not -- go on wire, load the box
and perform your tests.


On Thu, 26 Jun 2008 06:17:26 -0400, "Chris Brenton"
<cbrenton@xxxxxxxxxxxxxxxx> said:
On Thu, 2008-06-26 at 08:28 +0400, Naveed Ahmed wrote:

Hello All
There is another great tool at http://www.niiconsulting.com/products/Firesec.html

This will help you to housekeep rule bases as well as analyse them

IMHO the problem with all of these tools is that they assume the rule
base is an accurate description of what is permitted to pass on the
wire. Anyone who has done wire level testing knows this is very rarely
the case (think CP or Juniper permitted ACK session establishment to
simplify active-active, Cisco poor handling of ICMP errors, multiple
firewalls with poor sequence number or checksum validation, etc. etc.).

Tools like FTester or Dr. Morena will give you a much more accurate
view. More info at:

http://dev.inversepath.com/trac/ftester
http://www.securiteam.com/tools/5MP0P1F40Y.html

Or even better, snag copies of nmap, hping & Scrappy and customize your
testing. You may be pretty surprised at what you are leaking through.

HTH,
Chris



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