Building VPNs on OpenBSD

Table of contents

• 1. Introduction
• 2. IPsec overview
  • 2.1 IPsec protocols
  • 2.2 SA, SPI, SPD and other acronyms
  • 2.3 The life of an IPsec packet
• 3. IPsec on OpenBSD
  • 3.1 Preliminary steps
  • 3.2 Setting up the PKI
  • 3.3 Configuration
  • 3.4 Packet filtering
  • 3.5 Redundant VPNs with sasyncd(8)
• 4. OpenVPN
  • 4.1 Installation and configuration
    • 4.1.1 Setting up the PKI
    • 4.1.2 Server configuration
    • 4.1.3 Client configuration
  • 4.2 Starting the VPN
• 5. OpenSSH
  • 5.1 Configuration
  • 5.2 Starting the VPN
  • 5.3 Finishing touches
• 6. Appendix
  • 6.1 References
  • 6.2 Bibliography