I have Defined a Domain Name list and I am Browsing the Internet but I Cannot Access to sites in my Whitelist. What is the Problem?

You must be aware that certain websites could be doing redirections to different domains based on your location or loading resources from different subdomains. Your whitelist should include every URL that is required.

E.g. if the whitelist includes www.acme.com but the page requires resources from cdn.acme.com or it is forwarded to www.acme.ie then the web page won’t load properly.

This scenario is more unlikely to happen in IoT use cases where the destination is the URL of an API for e.g. MQTT traffic or device management platform.