Unfortunately, more and more traffic is coming in on ports
80 and 443. [Don't you love that for many application
developers, "security engineering" consists of making sure
that it's hard for network security to enforce policy against
the app?]
I'm forced to conclude that even stateful packet filter
firewalls will be useless within 3-5 years, if they're not
already, and that the hope for network-based policy enforcement
lies with SSL proxies that know about upper-level protocols
and even object types. [Blue Coat's latest effort looks good
to me -- I'd like to hear about other options that are out
there or coming up.]
David Gillett
-----Original Message-----
From: Ryan Cummings [mailto:l00t3r@gmail.com]
Sent: Wednesday, February 22, 2006 4:10 PM
To: phunked up!
Cc: Security-Basics
Subject: Re: What addresses to put on my NEW black list?
You might be much better off blocking the ports that
filesharing/streaming media come in on. You should be able
to do a bit of searching around and find the default ports
for most of these applications and shut them down at the
firewall level. Also depending on your firewall or even IDS
(this is debatable on the use:P) you could filter the content there.
I know searching around on shoutcast.com most of the
streaming stations use 8000+ for a port number so that is a
good start.
On 2/22/06, phunked up! <phunkodelic@gmail.com> wrote:
Trying to create a blacklist for my network. Want to include
addresses for mainly streaming audio, and file shareing. I have a
couple of network abusers who listen to internet radio that
just don't
follow company policy which has banned it. Yes I know I should try
and bust them but thats a pain in the butt and besides if I
do that I
don't get the joy or experience of doing this.
First off I was going to deny the addresses of various "bad"
severs/web sites on the net at my firewall. I was then going to
create a DNS entry that points all restriced IPs to a internal web
server that would host a page stating that the site is banned
(blackholing IPs).
As mentioned above the issue I have is finding the IP addresses to
ban. Any help would be appreciated.
Thanks!
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EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The Norwich University program offers unparalleled Infosec
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consulting experience.
Tailor your education to your own professional goals with
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EARN A MASTER OF SCIENCE IN INFORMATION ASSURANCE - ONLINE
The Norwich University program offers unparalleled Infosec management
education and the case study affords you unmatched consulting experience.
Tailor your education to your own professional goals with degree
customizations including Emergency Management, Business Continuity Planning,
Computer Emergency Response Teams, and Digital Investigations.
http://www.msia.norwich.edu/secfocus
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