How quick can I get message that the system is down or shutting down?

Thanks Rufin.

I have refresh the heartbeat by deleting the data folder and installed the outlook mail app.

All of a sudden I get

2018-05-16T17:44:07.133-0400    INFO    icmp/loop.go:330        IPv4 ICMP not supported: listen ip4:icmp : socket: An attempt was made to access a soc
ket in a way forbidden by its access permissions.
2018-05-16T17:44:07.135-0400    INFO    icmp/loop.go:330        IPv6 ICMP not supported: listen ip6:ipv6-icmp : socket: An attempt was made to access
a socket in a way forbidden by its access permissions.
2018-05-16T17:44:07.136-0400    ERROR   beater/manager.go:140   failed to load monitor tasks: failed to initiate IPv4 support when initializing monito
r icmp(0)

Any reason why this should be?

I have read RHEL6 ICMP ipv6 error at startup

But not using docker.

Please advise.

Thanks.

Phil