🔥 What is a Firewall? 🔥

A firewall is a network security device or software that acts as a barrier between a trusted internal network and an untrusted external network (like the internet). Its main job is to monitor, filter, and control incoming and outgoing network traffic based on predefined security rules. Think of it as a security guard that decides which data packets are allowed in or out of your network.

🛡️ Key Functions of a Firewall

1. Traffic Filtering:
   • Examines data packets and allows or blocks them based on security rules.
   • Filters traffic based on IP addresses, port numbers, protocols, etc.
2. Network Segmentation:
   • Separates networks into secure zones (e.g., separating internal resources from public servers).
3. Monitoring and Logging:
   • Keeps records of network activities to detect suspicious behavior.
4. Threat Prevention:
   • Blocks unauthorized access attempts, malware, and other security threats.
5. VPN Support:
   • Provides secure remote access using Virtual Private Networks (VPNs).