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Is a 2048 character password strong?
Kimmax117154yPassword authentication is obsolete.
Enroll your publickey instead.
If you really really really need pass auth, add Googles 2FA PAM module to the mix and setup the user as proper sudoer. Nooo, User bla ALL NOPASSWD is not a proper use of sudo rights.
Keep your privatekey safe stored and encrypted with a passphrase and you should be good to go.
Bonus points for using a VPN to the host and make SSH listen there only.
Linux441974yFail2ban blocks 100-200 IP every day in My env