Lecture 10 - Firewall

Question 1

Firewall

Answer 1

Network security device monitoring traffic based on security rules, creating a barrier between internal and external networks.

Question 2

Packet Filtering

Answer 2

Basic security function of a firewall, allowing or blocking traffic based on predefined rules.

Question 3

Application Proxy

Answer 3

Security function of a firewall that acts as an intermediary for requests from clients seeking resources from other servers.

Question 4

Stateful Inspection Firewall

Answer 4

Second-generation firewall able to track the state of network connections and make filtering decisions based on packet history.

Question 5

Application Layer Firewall

Answer 5

Third-generation firewall inspecting and filtering packets up to the application layer, capable of blocking specific content and recognizing application misuse.

Question 6

Next Generation Firewalls (NGFW)

Answer 6

Modern firewalls designed to counter advanced malware and application-layer attacks, utilizing deep packet inspection and other functionalities.

Question 7

Egress Filtering

Answer 7

Firewall inspection of outgoing network traffic to prevent internal users from accessing external networks.

Question 8

Ingress Filtering

Answer 8

Firewall inspection of incoming traffic to protect internal networks from external attacks.

Question 9

Firewall Access Policy

Answer 9

Critical component specifying authorized traffic types to pass through the firewall, derived from organization’s security risk assessment.

Question 10

User Control

Answer 10

Firewall policy controlling data access based on user roles within the network perimeter.

Question 11

Service Control

Answer 11

Firewall policy controlling access based on host services, network address, connection protocol, and port numbers.

Question 12

Direction Control

Answer 12

Firewall policy determining the direction of traffic flow, whether inbound or outbound.

Question 13

Host-based Firewalls

Answer 13

Firewalls installed on individual network nodes to control incoming and outgoing traffic, protecting hosts from attacks and unauthorized access.

Question 14

Network-based Firewalls

Answer 14

Firewalls operating at the network level, filtering all traffic across the network to protect internal networks.

Question 15

iptables

Answer 15

Linux’s built-in firewall program used for configuring firewall rules.