Firewall Wizards mailing list archives
Re: Blocking Offensive Material(??) with Firewall
From: Jason Olsen <jolsen () dpg devry edu>
Date: Wed, 16 Jun 1999 08:39:30 -0500 (CDT)
On Sun, 13 Jun 1999, Di Phelan wrote:
It seems to me that there are two ways of content blocking - at the ISP level with application level filtering using proxy servers and at the BSP level with packet filtering using routers.
Checkpoint's FireWall-1 package has a 'hook' for 3rd-party software. They allow the insertion of anyi-virus software, as well as content filtering. Basically, IIRC, you specify a package that has a list (updated daily) of all the 'objectionable content' sites they're aware of. If the Firewall sees a request to one of these sites, or material returning from one of them, it is dropped. Bear in mind these things: 1)This is 3rd party software/information. You have to subscribe to it. 2)There's always something new appearing on the net each day. The list may be updated daily, but how long does it take them to discover something "new"? A day? A week? A month? There will always be lag time. I also lack information on HOW they discover these websites. 3)Blocking isn't a pure science. They may add something to their black-list because it has the word 'cervix' or the like, when it's a legitimate site talking about uterine cancer. Who knows how in depth they investigate before adding it to their list. 4)As you mentioned... there's always ways around these things. My .02. -Jason *************************************************************************** *Jason Olsen * email: jolsen () dpg devry edu * *Internet Support Specialist ********************************* ******************************************* DeVry Institute of Technology * *Phone: (630) 953-1300 x1716 * 1221 North Swift Road * *http://www.dpg.devry.edu/ * Addison, Illinois 60101 * ***************************************************************************
Current thread:
- Blocking Offensive Material(??) with Firewall Di Phelan (Jun 15)
- Re: Blocking Offensive Material(??) with Firewall Jason Olsen (Jun 16)
- Re: Blocking Offensive Material(??) with Firewall Christoph Schneeberger (Jun 16)
- Message not available
- Re: Blocking Offensive Material(??) with Firewall Marcus J. Ranum (Jun 16)
- Re: Blocking Offensive Material(??) with Firewall Tim Kramer (Jun 20)
- Re: Blocking Offensive Material(??) with Firewall Darren Reed (Jun 20)
- Re: Blocking Offensive Material(??) with Firewall Marcus J. Ranum (Jun 16)
- Re: Blocking Offensive Material(??) with Firewall Jacob Leverich (Jun 20)
- Re: Blocking Offensive Material(??) with Firewall Randy Grimshaw (Jun 28)