Is it possible surely if the WAN port is dead or not? The green LED blinking is inconsistent and happens while connection and some time after, for me it looks like working.
The context: when I connect ISP cable directly to laptop, it is working fine, but when I connect cable to router WAN port it shows "Internet not connected" in router dashboard, previously it worked fine.
The router is Phicomm K3C, you probably never heard about it, it has stock firmware which is a cutted fork of OpenWRT, I can connect to it through Telnet and it has stripped BusyBox utilities.
It is possible to check WAN in bash or some way else?
Also this device has unofficial OpenWRT firmware (it is not in the officially supported list) and this firmware is reported to be buggy. I can install it, will it help?
I found anecdotal evidences that OpenWRT allows re-assigning WAN to any LAN port.
5 Reset to default