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Firewalls
advICE :Countermeasures : Firewalls
What you must know about firewalls:
Books
Read the top two books suggested in the Books list.
Intro
Read the introduction.
protection
Firewalls 'manage risk' ... they don't provide complete 'protection'. Beware the difference; don't become complacent (30% of the major corporations with firewalls get hacked).
easy solutions
The average router typically equals protection -- but fewer services -- than complicated, expensive solutions. Understand that an expensive firewall doesn't necessarily protect better than a cheap one, it just protects more services. The more services you pass through a firewall, the less secure you will be.
  • NAT (3)
    Network Address Translation, hides many IP addresses behind the firewall to a small set of addresses exposed to the Internet.
  • Products (7)
    Firewall products you can install.
  • Packet Filter (0)
    Static rules within the firewall that specify what MAY or MAY NOT be allowed.
  • rate filter (4)
  • Stateful Packet Filter (6)
    More intelligent than static filters, watches traffic to decide if the static filter rules need to be temporarily overridden.
  • Proxy (8)
    Store-and-forward, moves messages or files through the firewall rather than routing packets.
  • Tunneling (3)
    Getting applications (often multimedia) through firewalls
  • Filters (1)
    Common filters configure on filewalls
  • advICE: Port number database-Lookup rejected packets in our port number database in order to see what people might be attempting.
  • www.fwtk.org-The site for the "firewall toolkit", and open source firewall solution. This is an important product that firewall administrators should be familiar with.
  • ICSA firewall buyers guide-A guide by one of the largest independent organizations.

RESOURCES
  • Books
  • FAQs
  • Intro
  • News
  • Lists
  • Notes
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