This tweet discusses the enforcement layers for geo-blocking in web security: CDN, WAF, DNS, and application code. It emphasizes that each layer suits different needs. DNS-based geo-blocking is noted as the easiest to deploy but also the easiest to bypass, implying attackers can evade restrictions by manipulating DNS. Application code geo-blocking is the most granular and portable but likely more complex to implement. The tweet advises careful selection of the geo-blocking method to avoid wasting time or leaving security gaps, highlighting a common trade-off in security design between ease of implementation and security effectiveness.
Original tweet: https://twitter.com/ipgeolocationio/status/2051349154530476211