Not always online capsules

[Stephane Bortzmeyer]

On Wed, Sep 22, 2021 at 04:39:10PM +0100,
 Oliver Simmons <oliversimmo@gmail.com> wrote 
 a message of 12 lines which said:

> One currently possible way to detect the "severity" of the issue is
> via ping-ing the server.

Many machines/networks don't reply to or block the messages used by
ping so it is not realistic.

> Ping being ICMP control messages 0 & 8

With IPv4 only.