fail2ban for playSMS

This is how to use fail2ban to protect playSMS from invalid logins. Invalid logins can come from bots specifically programmed to guess playSMS passwords. Correctly configured fail2ban will ban/block/reject IP of users/attackers when playSMS got too many invalid logins in short period of time.

Please note that the actual ban is done by iptables, or whatever action command used by fail2ban.

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