Module 9: Firewall Technologies

Question 1

What are the 4 types of firewalls?

Answer 1

Packet Filtering (stateless)
Stateful Firewalls
Application Gateway (proxy) firewalls
Next Generation Firewalls

Question 2

What is a packet filtering (stateless) firewall?

Answer 2

part of a router firewall, it filters packets in the layer 3/4 based on preconfigured rules

Question 3

What is a Stateful Firewall?

Answer 3

most versitile and common firewall. Provides stateful packet filtering on layers 3/4/5

Question 4

What is a application gateway or proxy firewall?

Answer 4

These filter information at Layers 3, 4, 5, and 7. Most of the firewall control and filtering is done in software. When a client needs to access a remote server, it connects to a proxy server.

Question 5

What are three common firewall designs?

Answer 5

Private and Public
DMZ
Zone Based Policy

Question 6

What is a Private and Public firewall design?

Answer 6

The public network (or outside network) is untrusted, and the private network (or inside network) is trusted.

Question 7

What is a DMZ firewall design?

Answer 7

This is a firewall design where there is typically one inside interface connected to the private network, one outside interface connected to the public network, and one DMZ interface.

Question 8

What is a zone based policy firewall design?

Answer 8

use the concepts of zones to provide greater flexibility . A zone is a group of one or more interfaces that have similar functions or features?

Question 9

What is layered defence?

Answer 9

layered defence uses multiple layers of firewalls to add depth in security to a organisation.

Question 10

What are the 4 layers of defence?

Answer 10

Network core security
Perimeter Security
Communications Security
Endpoint Security