Step 1:
Configure fail2ban correctly.
Visit this article for fail2ban installation:
Step 2:
Create new filter for fail2ban.
Add filter.d/playsms.conf to /etc/fail2ban/filter.d/
Step 3:
Enable the filter to get fail2ban watch over playSMS log files.
Add jail.d/playsms.local to /etc/fail2ban/jail.d/
Step 4:
Reload fail2ban.
fail2ban-client reload
Monitor:
fail2ban-client status
fail2ban-client status sshd
fail2ban-client status playsms
Monitor fail2ban log file:
tail -f /var/log/fail2ban.log