I noticed banks are increasing the blocking of anonymizer VPN providers to deter fraud. When connecting from a VPN, the bank may block the login attempt, prompt the login process with a security question/answer, or in some more extreme cases, disable or close the account requiring the affected user to go into a branch to verify their identity with bank staff.
I understand why this is occurring with the increased fraud. However, my question is, what are the back-end providers banks are using to monitor for, detect, and prevent log-on from VPN providers?
Google research suggests several banks and financial providers use a company called Maxmind ([https://www.maxmind.com/en/home](https://www.maxmind.com/en/home)).
Does anyone know of any other back-end providers used to detect fraud during the log-on process?
Thank you for any insights or knowledge.