11.1.7. Web Filtering

11.1 Firewalls, IoT, and Embedded Systems

Firewall Rules

• Block access to websites by IP address, domain name, or port (80/443).

• Example: Configure firewall to reject traffic to a specific website.

DNS Filtering

- Blocks access to domains by filtering at the DNS level.

Proxy Servers

- Acts as an intermediary between users and the internet.

- Can filter, log, and restrict web traffic based on rules.

Web Security Gateway

- Advanced filtering with real-time malware, phishing, and category-based blocking.

- Used in enterprise environments for deep packet inspection.

GPO

Group Policy Object

• Blocks sites at the [[OS]] level using GPO settings.

- Can prevent access to browsers or enforce restrictions.