Free v4 front end for your v6 site

This is a service that will allow them to intercept your HTTP/S traffic being offered for free by a company that has been legally dead (following bankruptcy) for 12 years: https://datacvr.virk.dk/enhed/virksomhed/33753284

The company number I used to lookup is the one shown in the footer at http://www.netiter.com/

Maybe best to avoid!

EDIT: I don't mean to imply malice - many of us trust our *AAS providers with exactly this daily. But combined with the bankrupt company and overall vibe, I wouldn't be using it.

How does this work, technically?

Does it try guess the upstream by SNI / Host header and forward the data on? That'd only work for http(s) though.