Block brute force attackers

[Deleplace]

E.g. add their IP to an internal list of undesirables. Or accept messages only from registered device IDs, and ban abusive devices.

[Deleplace]

This is the logical consequence of issue #15 [Detect brute force attacks]

[Deleplace]

The potential brute force attack of "listen to many Pusher channels" is already improbable thans to #54.

There is stil however the potential brute force attack of "Sending spam to many target IDs". #35 would slightly mitigate it.

[Deleplace]

Another way blocking criterion is #77 [Reject action if more than 1 listener on channel]

[Deleplace]

Since #108 we estimate that attacks by brute force guessing has low probability, so we say the riposte for these supposedly unlikely events is not current priority.