Section 16.148 Configuring Firewalls

Question 1

Firewalls and Access Control Lists (ACLs)

Firewalls

Answer 1

Dedicated devices for using Access Control Lists (ACLs) to protect
networks

Question 2

Firewalls and Access Control Lists (ACLs)

Access Control Lists (ACLs)

Answer 2

A rule placed on firewalls, routers, and network infrastructure devices

● Control the flow of traffic into and out of networks

● May define quality of service levels inside networks but are primarily used for network security in firewalls

Question 3

Configuring ACLs

Answer 3

■ A web-based interface or a text-based command line interface can be used

■ The order of ACL rules specifies the order of actions taken on traffic (top-down)

■ The first matching rule is executed, and no other ACLs are checked

■ Place the most specific rules at the top and generic rules at the bottom

■ Some devices support implied deny functions, while others require a “deny all” rule at the end

■ Actions taken by network devices should be logged, including deny actions

Question 4

ACL Rules

Answer 4

Made up of some key pieces of information including

● Type of traffic
● Source of traffic
● Destination of traffic
● Action to be taken against the traffic

Question 5

Firewall Types

Hardware-Based Firewall

Answer 5

A dedicated network security device that filters and controls network traffic at the hardware level

● Commonly used to protect an entire network or subnet by implementing ACLs and rules

Question 6

Firewall Types

Software-Based Firewall

Answer 6

A firewall that runs as a software application on individual devices, such as workstations

● Utilises ACLs and rules to manage incoming and outgoing traffic,
providing security at the software level on a per-device basis

Question 7

Watch this section before exam as setting up firewall example in the video will come up

Answer 7

Windows