Question: How can I control who accesses my site based on IP address, country, and ISP?

Blockify is a fraud prevention tool that keeps undesirables from visiting your online store. It's got sophisticated block and redirect rules so you can control access by IP address, country and ISP. It's got visitor analytics, smart rules, bot and fraud blocking and geo-location redirect, so it's a good option if you want to make sure your customers have a safe and frictionless experience.

Another option is MaxMind, which offers real-time IP geolocation and online fraud prevention through machine learning technology. It offers location data and can help you manage digital rights and security. MaxMind also blocks unauthorized access from VPNs, proxy users and anonymizers, which can be useful for businesses that need to protect against abuse.

Ipregistry offers IP Geolocation and Threat Intelligence that can help businesses identify and profile users, block fraud and analyze logs. It offers detailed and reliable IP address data, including information on more than 3 million unique locations around the world. The service is good for e-commerce and financial services businesses, and it's easy to integrate with refined JSON and XML APIs.