Firewall Services
Network packet filtering and access control
Firewall Services
Firewall services implement packet filtering, access control, and network traffic policy enforcement at the network layer. These services protect the network from unauthorized access, implement security policies, and integrate with intrusion detection systems providing comprehensive network defense.
In This Section
Firewall Architecture
Complete guide to Pimeleon's firewall architecture using nftables framework. Covers rule structure, traffic filtering policies, port forwarding configuration, DDoS protection mechanisms, and integration with fail2ban intrusion prevention system. Includes planning content for future expansion.
Service Capabilities
- Packet Filtering: Layer 3/4 filtering based on source, destination, protocol, and ports
- Stateful Inspection: Tracking connection states for intelligent traffic analysis
- Network Address Translation: IP address and port translation for network access
- Port Forwarding: Selective redirection of traffic for service access
- Rate Limiting: Preventing denial-of-service attacks through traffic throttling
- IPS Integration: Coordinating with fail2ban for dynamic threat response
- Traffic Logging: Complete audit trail of firewall decisions
Rule Categories
- Inbound Rules: Controlling traffic entering from external networks
- Outbound Rules: Monitoring and restricting traffic leaving the network
- Forward Rules: Controlling traffic transiting between network segments
- Management Rules: Protecting administrative services
- Service Rules: Specific protection for network services
- Exception Rules: Allowing required traffic through otherwise restrictive policies
Configuration Highlights
- nftables Framework: Modern, efficient packet processing
- Connection Tracking: Intelligent tracking of connection states
- Modular Rules: Organized rule structure for maintainability
- Performance: Optimized for home network throughput
- Automatic Updates: Dynamic rule adjustment based on threat detection
- Documentation: Clear comments explaining firewall logic
Related Services
- Security Services - Security infrastructure overview
- Filtering Services - Threat detection
- Monitoring Services - Activity monitoring