Hi. On Sat, Aug 13, 2022 at 07:42:28PM +0200, Maurizio Caloro wrote: > how I can disable this?, I try solution with failban, but this want be > help!? > > [sshd] > Enable = true > Mode = normal
As /etc/fail2ban/filter.d/sshd.conf shows, "no matching host key type" messages are specifically ignored by Mode=normal. Try setting Mode=aggressive, it should catch those. Of course, DROPping ssh connections from AS28594 would work too. Unless you're from Brazil, that is. Reco