configured

Whether a is configured on an interface of this host — i.e. whether any client's resolver can be sent there at all. The interface table, not a probing bind: a bind answers "can THIS JVM take it", which is a different question, and it needs an ephemeral port that is not always there.

Unreadable reads as PRESENT: this answer only ever RELAXES the rule in bindAll, so an uncertainty has to resolve to not relaxing it.