Bots guess usernames like “admin” and “administrator”. On most sites those names don’t exist, so any attempt with them is a bot. Phantom User Lockout records each one and blocks the IP address that made it.

For every attempt with a username that doesn’t exist on your site, you get:

The time, in site time with UTC on hover
The username and the password that was tried
The IP address, shown as IP Blocked, Not blocked or Safe
Where the IP is: city, region and country
Who owns it: the hosting company or network (for example “AS53667 FranTech Solutions”) and the reverse hostname
How the attempt came in: the login form, XML-RPC (every guess inside a system.multicall batch gets its own row), REST API application passwords, or another login form
The user agent and the requested URL

Blocking

An IP is blocked after its first attempt with a username that doesn’t exist. You can raise that threshold.
Blocks are permanent. They only lift when you press Unblock.
A blocked visitor gets a 403 page that reads “IP Blocked”.
By default a block covers the login page, XML-RPC, REST logins and any other form that logs in through WordPress. You can widen it to the whole site.
Optionally, the plugin can also block IPs that enter the wrong password for a real username. This is off by default, and the default threshold is 3 wrong passwords.

Built not to lock you out

Real accounts are never recorded unless you turn on the real-account option, and even then their passwords are never stored.
If a username is within two letters of a real login or email, it’s treated as a typo by one of your own people. It’s logged with the password hidden and never causes a block.
Safe IPs are never recorded or blocked. Add yours with one click: “Add my current IP address to the list”.
A signed-in administrator is never blocked. Neither are the server’s own address and loopback.
Emergency switch: add define( 'BOTLO_DISABLE', true ); to wp-config.php.

The plugin never edits .htaccess or any other server file.

External services

To show where an IP address is and who owns its network, the plugin looks the address up with ipinfo.io.

What is sent: only the IP address that made the login attempt, plus your ipinfo.io token if you entered one in Settings. No information about your site, your users or your visitors is sent.
When: once per new IP address, in the background shortly after its first attempt, or when an administrator opens the Phantom User Lockout screen while a lookup is still pending.
Turning it off: Settings Location lookups.
ipinfo.io terms of service: https://ipinfo.io/terms-of-service
ipinfo.io privacy policy: https://ipinfo.io/privacy-policy

Privacy

The plugin stores IP addresses, user agents, usernames and passwords from failed login attempts that used usernames which don’t exist. It adds suggested wording to Settings Privacy Policy Guide.