I been getting a lot of scans like this, Is this anything I need to worry about? How can I adjust BFD to ban these faster?

1525 events to the service sshd

/etc/apf/apf -d ns1.datavision.net.gr {bfd.sshd}

The following are event logs from ns1.datavision.net.gr on service sshd (all time stamps are GMT -0500):

Dec 15 11:08:37 secure sshd[14317]: reverse mapping checking getaddrinfo for ns1.datavision.net.gr failed - POSSIBLE BREAKIN ATTEMPT!


Thank you,
Bill

BFD runs via a cronjob every 10 minutes, if you want can lower the time. Just be aware it can be pretty resource intensive if you run it frequently.

BFD is awesome. I get about 3 emails a day of people that are added to my firewall's deny list for trying to log into SSH.

Yeash BFD rules, bans IP's for massive spam too...