reCAPTCHA in a local network machine

Question

How can I use Google's reCAPTCHA in a test server on a local network?

According to the documentation:

By default, all keys work on "localhost" (or "127.0.0.1"), so you can always develop and test on your local machine.

My virtual machines however are located on non-localhost local IPs (192.168.XXX.XXX), and adding "localhost" or "127.0.0.1" does not seem to work (the captcha displays an invalid domain error). Is there any way around this?

Answer 1

You can enter a local IP such as 192.168.0.1 into the admin console and will indeed work (you'll have to wait a few minutes for it to apply).

Unfortunately it is limited to only 50 domains so this may not be a solution.

Answer 2

Beside adding the local IP to the admin console (as Drew suggested)

you can also (temporarily) disable the origin validation.

go to the admin console

Advanced Settings -> uncheck "Verify the origin of reCAPTCHA solutions"

Note: If disabled in production - you are required to check the hostname on your server when verifying a solution.