Comment 13 for bug 1669501

One more thing to note.. On all my gce failures (yellow triangles here: http://bigtop.charm.qa/index.html), this is failing to connect to units with subordinates.

Perhaps juju does a couple preauths for the principal unit and then does another couple for the subordinate. sshguard's default threshold is "40 points", and each preauth counts as 10. I suspect colocating applications on the same machine would also trigger it.

If you're looking for a gce repro scenario, i suggest using a principal/sub to get your ip blocked (the default block time is 20m).