NS: Chapter 4: FIREWALL

Target Audience: Single system or small network

• Personal Firewall

• Commercial Firewall

Target Audience: Medium-to-large networks

• Personal Firewall

• Commercial Firewall

Select THREE categories of Firewall

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Intrusion Detection System

The most oldest and basic type of firewall

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Intrusion Detection System

It is a stateless inspection firewall

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Intrusion Detection System

Firewall that monitors on Layer 3/OSI: source and destination IP addresses) and Layer 4: TCP and UDP

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Intrusion Detection System

Firewall that monitors on: Layer 7/OSI: application layer

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Circuit Level Gateway

Firewall that designed to masquerade as the original client and requests on its behalf

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Circuit Level Gateway

Firewall that provides additional capabilities, such as checking TCP three-way handshake against firewall rules

• Packet-Filtering Firewall (Stateless)

• Stateful Inspection Firewall

• Proxy Firewall

• Circuit Level Gateway

Firewall that can practically monitor all network layers, from OSI Layer 2 to OSI Layer 7.

• Next-Generation Firewall

• Cloud Firewall

• Proxy Firewall

• Circuit Level Gateway