Guest Ban via API?

[EOMA]

I am getting alot of guest traffic I want to stop - Not posting, just failed login attempts

I have added the IP;s to the ban list but as has been discussed before

I am looking for instructions as how to upload an amended .htaccess file - I am hosted by IP board

Do I download the file from rest api and add:

order allow,deny
deny from xxx.xxx.xx.xx
deny from xxx.xxx.xxx.xxx
allow from all

Or not?

Help appreciated as always

Regards