Firewalls

A firewall is typically a system used to enforce an access control policy between two networks. The firewall sits between two networks, examines all traffic that goes through the two networks, and only allows "authorized" traffic to pass through. The firewall enforces an authentication system that allows only authorized individuals to gain access to the private network.
  1. Types of Firewalls
  2. Firewall Pros and Cons
  3. Firewall Policy
  4. Next-Generation Firewalls
  5. Allowing Remote Access to Users - use a modem pool and locate outside firewall
  6. Demilterized Zone (DMZ) - extra layer of protection with servers that exist between protected network and external network attached at the firewall (3 NICs)
  7. Implementing Firewall Services