Routers Error Code
Systems & Devices
Routers
Error 806 | VPN connection failed
Industry
Systems & Devices
Canonical
/systems/routers/error-codes/error-806/
Last Updated
Feb 27, 2026
Summary
A VPN connection could not be established, often due to blocked ports or protocol restrictions.
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What This Code Means
Error 806 is a VPN connectivity failure often associated with blocked traffic required for the VPN protocol. It commonly points to firewall, NAT, or ISP restrictions preventing the VPN tunnel from forming.
Where Users Usually See This Code
- PPTP/L2TP VPN connections from home or office networks
- Networks with strict outbound firewall policies
Why This Code Appears
- Firewall blocks required VPN ports/protocols
- NAT device does not support required passthrough
- VPN server is unreachable or misconfigured
What Typically Happens Next
- The VPN fails to connect
What This Code Is Not
- It is not a Wi-Fi SSID/password issue
- It is not a guarantee that credentials are wrong
Troubleshooting Checklist
- □ Test VPN from a different network (mobile hotspot) to isolate local blocks
- □ Confirm required VPN ports/protocols are allowed by the firewall/router
- □ Check VPN server status with your admin/provider
Notes And Edge Cases
Some ISPs block older VPN protocols; modern VPN options may work better if supported by your provider.
Related Codes
8 links
- Error 809 CodeVPN tunnel could not be established
- Error 789 CodeL2TP connection failed
- Error 651 CodeConnection failed
- Error 772 CodeDial-up failed
- Error 691 CodeAccess denied
- Error 720 CodePPP control failed
- Error 812 CodeConnection blocked by policy
- Error 807 CodeNetwork connection interrupted
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