Network Defense

Device Hardening

The practice of making a network or device more secure.

Network Access Control (NAC)

Only allows authorized users and devices to access resources on a network.

Posture Check

Ensures a device is safe and unaffected by malware.

MAC Filtering

Restricting network access based on a device’s physical address.

Access Control List (ACL)

A list of rules on a firewall that dictate what is allowed to enter a network.

Content Filtering

Scans traffic for things like keywords, phrases, malicious content, images, and videos to block devices from being able to access harmful content.

Zones

A way to divide a network separated by a firewall.

Trusted Zone

Uses methods such as authorization to control access to resources; security is high.

Untrusted Zone

Security is low and there is a high risk.

Firewall

Filters traffic to prevent unauthorized data from entering a network. Uses an ACL.

Demilitarized Zone (DMZ)

A separate subnetwork that sits between a trusted internal network and an untrusted network like the internet. Typically holds public-facing services so external users can reach them without needing direct access to an internal network.