UniFi gateway from the knowledge base: port forwarding, VPNs, WAN failover and threat detection
Solve the gateway problems Ubiquiti's help center covers most: port forwards that don't work (CGNAT, double NAT, UPnP, host firewalls), hairpin NAT and Dynamic DNS, choosing and troubleshooting Teleport, WireGuard and site-to-site IPsec VPNs, multi-WAN failover and load balancing, IDS/IPS detections, and local DNS records.
- Level
- Intermediate
- Length
- About 60 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 2 Oct 2026
- Ubiquiti UniFi
Skills you'll practise
- Recognize private and CGNAT WAN addresses and explain why a port forward or Dynamic DNS can't work behind them
- Work through Ubiquiti's port-forwarding troubleshooting list in order
- Choose between Teleport, WireGuard, a VPN client and site-to-site IPsec for a request, and give users the right setup
- Troubleshoot a site-to-site IPsec tunnel that won't connect or won't pass traffic
- Explain how UniFi decides a WAN is down and how load balancing keeps sessions on one WAN
- Triage an IDS/IPS detection and pick a response without hiding real threats
Course outline
- 1.UniFi gateway from the knowledge baseVideo · 2 min
- 2.Port forwards, hairpin NAT and Dynamic DNSLesson · 20 min
- 3.Remote access and site-to-site VPNsLesson · 20 min
- 4.Multi-WAN, threat detection and local DNSLesson · 20 min
- 5.UniFi gateway from the knowledge base: port forwarding, VPNs, WAN failover and threat detection: knowledge checkKnowledge check · 17 questions
- 6.Final exam11 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.
- Ubiquiti Help Center: UniFi Gateway - Port Forwarding
- Ubiquiti Help Center: Hairpin NAT in UniFi
- Ubiquiti Help Center: UniFi Gateway - Dynamic DNS
- Ubiquiti Help Center: UniFi Gateway - Introduction to VPNs
- Ubiquiti Help Center: UniFi Gateway - Teleport VPN
- Ubiquiti Help Center: UniFi Gateway - WireGuard VPN Server
- Ubiquiti Help Center: UniFi Gateway - Site-to-Site IPsec VPN
- Ubiquiti Help Center: WAN Failover, Load Balancing and Port Remapping on UniFi Gateways
- Ubiquiti Help Center: UniFi Gateway - Intrusion Detection and Prevention (IDS/IPS)
- Ubiquiti Help Center: UniFi DNS Records and Local Hostnames
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