Redundant firewalls with OpenBSD, CARP and pfsync

Table of contents

• 1. Introduction
• 2. Network layout
• 3. Base configuration
• 4. The CARP protocol
  • 4.1 Configuration parameters
    • 4.1.1 The demotion counter
    • 4.1.2 Load balancing
  • 4.2 Parameters configuration
    • 4.2.1 Active/standby configuration
    • 4.2.2 Active/active configuration
• 5. The pfsync protocol
• 6. PF rules!
• 7. Appendix
  • 7.1 References
  • 7.2 Bibliography