password guessing

A curious thing that I'd like to understand. Blacklistd enabled in sshd config. Connecting from another external IP to ssh and issuing two wrong logins/passwords results in immediate lockout, as expected and defined in the config file. A new entry gets added to blacklistd table in pf as...

Here I present a script which works like a simple intrusion detections system. I have made the script a long ago and used it for a long time. Now I have decided to share the script with the community. If this Forum is not a right place for such publications, I hope, the Community can suggest...