Network Security

Today we will learn about network security, threats, and defenses.

Explanation

Network security protects data during transmission and prevents unauthorized access to networks.

Key Concepts:

Threats: Man-in-the-middle, DDoS, eavesdropping.

Defenses: Encryption, firewalls, IDS/IPS.

Protocols: TLS, IPsec.

Technical:

How It Works:

Uses encryption, access controls, monitoring to secure traffic.

Security Benefits:

Protects against interception, ensures integrity.

How to setup one properly:

General Best Practices

1. Use WPA3 for Wi-Fi.
2. Segment networks.
3. Monitor traffic.

Client

Configure secure connections.

Linux/macOS

1. Use VPN for public Wi-Fi.
2. Enable firewall.

Windows

1. Use Windows Firewall.
2. Connect to secure networks.

Server

Implement network security.

Linux

1. Use iptables for rules.
2. Enable TLS.

Windows

1. Use Windows Firewall.
2. Configure IPSec.

Samples:

Example iptables Rule

-A INPUT -p tcp --dport 443 -j ACCEPT

Example TLS Config

ssl_protocols TLSv1.2 TLSv1.3;

Recommended

• Use VPNs.
• Implement IDS.
• Regular audits.