fail2ban

sudo apt install -y fail2ban

and in few hours

sudo fail2ban-client status

# Status
# |- Number of jail:	1
# `- Jail list:	sshd

sudo fail2ban-client status sshd

# Status for the jail: sshd
# |- Filter
# |  |- Currently failed:	1
# |  |- Total failed:	194
# |  `- File list:	/var/log/auth.log
# `- Actions
#    |- Currently banned:	0
#    |- Total banned:	15
#    `- Banned IP list: