Cisco Meraki MX troubleshooting: blocked traffic, Auto VPN, client VPN, port forwards and DHCP conflicts
Meraki's own troubleshooting guides turned into a working routine: gather the right facts, find which MX feature (Layer 3 or Layer 7 rule, content filtering, threat protection or a group policy) is blocking traffic and where each one logs; read the VPN status page to separate registry, NAT, route and subnet problems in Auto VPN; fix client VPN connections and resource access; and trace port forwarding and DHCP conflicts with simultaneous packet captures and the event log.
- Level
- Advanced
- Length
- About 55 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 2 Oct 2026
- Cisco Meraki
Skills you'll practise
- Collect the device, network and resource facts Meraki recommends before troubleshooting blocked traffic
- Identify which MX security feature is blocking traffic and where its evidence appears (event log, Security Center, firewall logging tool, packet capture)
- Diagnose Auto VPN failures from the VPN status page: registry disconnected, unfriendly NAT, unadvertised or overlapping subnets
- Resolve client VPN connection and resource-access problems such as a changed uplink IP, shared secret mismatch, subnet overlap, DNS and NetBIOS
- Use simultaneous internet and LAN captures to find why a port forward doesn't work
- Explain what an MX client IP conflict event means and track down its cause
Course outline
- 1.Meraki MX troubleshootingVideo · 2 min
- 2.Blocked traffic: which feature, and where it logsLesson · 19 min
- 3.Auto VPN and client VPNLesson · 19 min
- 4.Port forwarding and DHCP conflictsLesson · 17 min
- 5.Cisco Meraki MX troubleshooting: blocked traffic, Auto VPN, client VPN, port forwards and DHCP conflicts: knowledge checkKnowledge check · 18 questions
- 6.Final exam12 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.
- Cisco Meraki documentation: Troubleshooting Blocked Traffic
- Cisco Meraki documentation: Auto VPN Troubleshooting
- Cisco Meraki documentation: Troubleshooting Client VPN When all Devices Cannot Connect
- Cisco Meraki documentation: Troubleshooting Resource Access Issues when Connected to a VPN
- Cisco Meraki documentation: Troubleshooting Port Forwarding and NAT Rules
- Cisco Meraki documentation: Troubleshooting DHCP Conflicts
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