Tunning fail2ban in Plesk

Plesk allows to tune configuration of almost everything. fail2ban configuration is locates on the page Tools & Settings. Locate the section of IP Address Banning (Fail2Ban)

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On the jails tab you can see what is enabled already: Screenshot from 2015-05-15 11:12:08

SSH Jail:
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Change settings Screenshot from 2015-05-15 11:12:39

You can edit the config:
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Refer to the Configure Fail2Ban for more precise configuration.