1
Verify the likely cause
Compare the router WAN address with the public address, bridge one router and request a public IPv4 address or use a secure tunnel.
FULL AI ANALYSIS
Port forwarding works internally but not from the internet
Generated Sep 12, 2026, 11:55:04 PM
Analysis summary
The reported behaviour is consistent with double NAT or carrier-grade NAT prevents the public connection from reaching the inner router. The safest next step is to verify that hypothesis with a reversible test before making permanent configuration changes.
Possible causes
Double NAT or carrier-grade NAT prevents the public connection from reaching the inner router.
76%A recent software, firmware or configuration change is exposing an existing compatibility issue.
30%Suggested fixes
2
Validate and monitor
Reproduce the issue once after the change, review relevant logs or metrics, and keep a rollback path until the system has remained stable.