> And in fact, the glibc resolver (and I bet also other major implementations) does send such queries to the DNS server. Using the glibc resolver as baseline i

> And in fact, the glibc resolver (and I bet also other major implementations) does send such queries to the DNS server. Using the glibc resolver as baseline is a bad idea, it’s broken beyond hope. Try resolving http://-emmawatson.tumblr.com/ http://-emmawatson.tumblr.com/, which is a valid URL under newer standards, and works on all other systems. The Glibc authors refuse to merge patches fixing this, because they disagree with the standard.