Blacklist username question

On the pro version security settings page under “Username Auto Blacklist- Attackers generally use common usernames like admin, administrator, or variations of your domain name / business name. You can specify such username here and Loginizer will auto-blacklist the IP Address(s) of clients who try to use such username(s).”

My question is – when a IP is blacklisted here, does it only affect the admin section of the site, or the whole site (frontend too)

Thank you