What is the IBDNS?

The acronym "IBDNS" can refer to two different things, depending on the context:

1. Intentionally Broken DNS (IBDNS): This is a specialized authoritative name server developed by Afnic (the association responsible for the .fr top-level domain). Its purpose is to intentionally deviate from DNS RFCs (Request for Comments) on demand. This allows developers to test the robustness and correct operation of DNS testing tools, such as Zonemaster, by simulating various "broken" or non-compliant DNS server behaviors that might be encountered in the real world. It helps identify how well DNS clients and diagnostic tools handle malformed messages or incorrect server responses.
2. ibDNS (as a Smart DNS service): This refers to a Smart DNS service offered by companies like ibVPN. Smart DNS is a technology that allows users to bypass geo-restrictions and access region-locked content (like streaming services) without the encryption overhead of a full VPN. It works by routing only the DNS requests through a different server, making it appear as if the user is in a different location. ibDNS, in this context, is a specific product that provides this Smart DNS functionality.

Given the current time and recent developments, the "Intentionally Broken DNS" is a more recent and notable development in the DNS world, especially with its open-source release by Afnic. However, it's important to be aware of both meanings to avoid confusion.