offtza wrote Same problem here, I've got Model No. Archer C2, just upgrade firmware to 0.9.1 0.11 v0032.0 Build 141117 Rel.54392n and can't ping it from world. Mine has ethernet WAN port. Under...

Very strange issue. If you get a reply from their support team, pls share it here. I'm so curious... :)

How did you test it? Your PC is using a static IP? WAN IP on C7 is public or private?

Can you install the latest TP-LINK firmware to try? If you doubt it is a hardware failure, you can report it here. http://www.tp-link.com/en/Support/contact/

If you cannot login webpage when the problem occurs, how did you view the log? 140903 is not the latest firmware... How about status of all lights in WDR4300?

It worked. That's fine. Enjoy it. Just the firmware cannot be upgraded to English version.