Difference Between Packet Filter and Firewall in Cyber Security,
| Feature | Packet Filter | Firewall |
|---|---|---|
| Definition | Filters network traffic based on packet header data. | Controls, monitors, and filters all network traffic. |
| Layer of Operation | Operates at Network Layer (Layer 3). | Operates at multiple layers including Application Layer. |
| Filtering Criteria | Based on IP address, port number, and protocol. | Includes IP, port, session state, and application data. |
| State Awareness | Stateless — does not track connection states. | Stateful — tracks and manages connection states. |
| Depth of Inspection | Only inspects packet headers. | Can inspect the full packet including payload. |
| Security Level | Basic — limited filtering and control. | Advanced — intelligent threat detection and prevention. |
| Configuration | Simple rule-based configuration. | Context-aware and complex configurations possible. |
| Blocking Capabilities | Blocks based on static rules for IPs/ports. | Can block malicious apps, behaviors, and traffic patterns. |
| Monitoring & Logging | Minimal or no logging features. | Extensive logging, monitoring, and alert systems. |
| Use Case | Suitable for small/simple network environments. | Best for enterprise networks and secure infrastructure. |