VPNs and WireGuard troubleshooting
Site-to-site and remote-access VPN concepts, and a methodical way to troubleshoot WireGuard tunnels.
- Level
- Intermediate
- Length
- About 45 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Choose between site-to-site and remote-access VPNs, and split or full tunnel
- Read `wg show` output to judge tunnel health
- Find AllowedIPs mistakes in a WireGuard configuration
- Troubleshoot tunnels in a sensible order without exposing keys
Course outline
- 1.WireGuard troubleshooting step by stepVideo · 2 min
- 2.How WireGuard decides what to sendLesson · 18 min
- 3.Site-to-site WireGuard: routing in both directionsLesson · 16 min
- 4.Remote-access clients: NAT, keepalive and DNSLesson · 15 min
- 5.VPNs and WireGuard troubleshooting: knowledge checkKnowledge check · 15 questions
- 6.Big downloads hang over the new VPNScenario
- 7.Final exam7 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- WireGuard: Conceptual overview and quick start (wireguard.com)
- wg(8) and wg-quick(8) manual pages
- RFC 4301: Security Architecture for the Internet Protocol (for IPsec comparison)
See it with your own jobs and topics
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