Get the latest tech news
Images over DNS
What's the limit of what can be in a TXT record? Some places say 255 bytes. They are wrong.
I set out to demonstrate exactly that, by using Google Public DNS's JSON API and then serving large TXT responses over TCP, from a custom server. Because the web version uses Google's JSON resolver we know it doesn't have problems querying very large TXT records, however your local recursor may not support this. It would be possible to increase this and therefore get caching from the recursors, a bit like a free distributed CDN (although I suspect if someone actually did this they would adaptively limit TTLs, if something like that isn't already done).
Or read this on Hacker News
