Network+/Security/Firewalls

This lesson covers firewalls.

Objectives and Skills

Objectives and skills for the firewalls portion of Network+ certification include:

• Given a scenario, install and configure a basic firewall
  • Types of firewalls
    • Host-based
    • Network-based
    • Software vs hardware
    • Application aware/context aware
    • Small office/home office firewall
    • Stateful vs stateless inspection
    • UTM
  • Settings/techniques
    • ACL
    • Virtual wire vs routed
    • DMZ
    • Implicit deny
    • Block/allow
      • Outbound traffic
      • Inbound traffic
    • Firewall placement
      • Internal/external

Readings

1. Wikipedia: Firewall (computing)
2. Wikipedia: Comparison of firewalls

Multimedia

1. Watch YouTube: Firewalls - CompTIA Network+ N10-006 - 3.5.
2. Watch YouTube: Firewall Configurations - CompTIA Network+ N10-006 - 3.5.

Lesson Summary

• There are many implementations of software based Firewalls, some of the most popular are: Netfilter (iptables), ipfirewall and PF