Hi everyone,

I have been looking into ways to detect whether a user is using proxy or vpn. There are quite a few online services that allow you to do this by sending an ip address via their API. The service typically returns info on the ip address back. I have yet to find the best service and most straightforward way to do this. Did anyone successfully try this before in their otree app? What technique did you use?

Thanks in advance for sharing!

Victor

I would look at who was assigned the subject's IP address (e.g., using "whois") and classify subjects accordingly (but manually).

https://en.wikipedia.org/wiki/WHOIS