I have the same problem today, but it’s not a firewall problem. I can ping bitmain just fine and even do Traceroute successfully. The error shows up in the field in the overview section that normally says what the hardware version is. I’m on DHCP, no firewall msgs that I can tell, using an ATT DSL modem/router, again, getting out just fine. Pool configurations are correct, but two were showing dead this morning, so I added a third. Then this happened.