Mess with DNS
This tool is so neat! One thing I've learned from it is my ISP (sonic.net) seems to be doing queries to _.example.com. For instance:$ dig @50.0.1.1 nelson.lily6.messwithdns.com aResults in two queries being answered by the messwithdns server. One for nelson.lily6.messwithdns.com as expected, but also one for _.lily6.messwithdns.com.Any guesses what that naked underscore query is for? Not every nameserver does it (Cloudflare, Google, Quad9, and Adguard all don't). But Sonic isn't the only one that does.I've asked on Twitter and the best guess right now is it has something to do with RFC2782 or RFC 8552. But those are about using _ to make unique tokens that aren't likely domain names, things like _tcp or _udp. What would a naked _ mean?