Re: firewall auditing/testing

[Rod Seney <rodseney () yahoo com>]

Rocky,

I would just write ACL lines to prevent all traffic
from your "public" network addresses with a
destination to your two "private" networks addresses. 
I would put it inbound on the "public" network's FE
interface.

Rod

Rod Seney - CCNP, CCSP
IT Manager
Butler Automotive Group
--- Rocky <pixscreenpoint () gmail com> wrote:

> Thank you again for very helpful inputs.
>
> my network is very simple, i make it simple :)
>
> Internet---T3/3845 IOS FW/IPS-----Three FE
> interfaces(internal net).
>
> the 3 FE interfaces are totally independent to each
> other with their
> own MS Server2003 AD with different application
> running on each
> and also different sets of private ip address on
> each network.
>
> One FE interface network is public access with 3
> wireless AP and it
> should not access the 2 other network and vice
> versa.
>
> Most of our heavy traffic came from this
> network(public access) which
> mostly http traffic that i can see through NBAR and
> MRTG..P2P clients
> are blocked from all internal network. Our deeply
> concerned is the public
> access network which might or has a potentials to
> access the 2 other
> internal networks.Thats what my director is scared
> of, and he is
> concerned that someone
> is accessing the workstations inside the 2 network.
>
> Using NMAP,Nessus to penetrate the 2 internal
> network and servers
> are not giving me any responses that is why i'm
> pretty sure that the
> 2 network is secured. ICMP traffic is deny from all
> interfaces and each
> network are also define in my ACL to deny, i just
> permit one
> workstation for troubshooting purposes.
>
> As i said i cannot fathom my director of what he
> wanted coz he doesn't
> much understand about network security technology.
>
> Is there any way to segregate this public access
> interface from
> the other 2 interfaces? do you think this designed
> is not appropriate?
>
> Thanks again,
> Rocky
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This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's 
Choice Award from eWeek. As attacks through web applications continue to rise, 
you need to proactively protect your applications from hackers. Cenzic has the 
most comprehensive solutions to meet your application security penetration 
testing and vulnerability management needs. You have an option to go with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can 
help you: http://www.cenzic.com/news_events/wpappsec.php 
And, now for a limited time we can do a FREE audit for you to confirm your 
results from other product. Contact us at request () cenzic com for details.
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