Lucas Bonomo

Just show the remote IP of client (with a shortcode [show-remote-ip]) and public an endpoint to show the IP (/wp-json/show-remote-ip/v1/get-ip)

Show Remote IP

Just show the remote IP of client (with a shortcode [show-remote-ip])  and public an endpoint to show the IP (/wp-json/show-remote-ip/v1/get-ip)

Minor

Simple plugin to secure your WordPress admin interface thanks to IP whitelisting. Only IP addressess on the whitelist (external whitelist supported) have an access into admin interface.
Another possibility how to access WordPress administration is thanks to secret admin link (you still need to insert correct user login and password).
Your IP address is whitelisted and secret admin link generated every time at plugin activation!

Secure Admin IP

Simply restrict login to your WordPress for the specific IP addresses or users with secret link.

Show Remote IP vs Secure Admin IP