Unresponsive Servers
These servers have sent a heartbeat but have failed to respond to an appropriate query from a different port. This can happen when:- Server is firewalled and all inbound packets are dropped. Try reconfiguring your firewall to allow packets to that process or port.
- An intermediate router implements an Address/Port-Dependant-Filtering NAT. Try setting up port forwarding.
- Outgoing connections are asynchronous with regard to port forwarding. Such servers will show with arbitrary ephemerial ports. Docker: you can supposedly work around this with --net=host.
- Plain and simple packet loss, servers in this state for less than 5 mins may still be fine.
- Server crashed or was reconfigured before it could respond.
- MTU limits with failed defragmentation.
- Routing table misconfiguration.
- Other.
1 server