> 127.0.0.1 news.ycombinator.com That's quite inefficient. Your browser ( and any other apps ) will attempt to connect to your legacy IPv4 localhost, time-out

> 127.0.0.1 news.ycombinator.com That's quite inefficient. Your browser ( and any other apps ) will attempt to connect to your legacy IPv4 localhost, time-out and fail, assuming you don't have a web server listening there. Better to black-hole with an unroutable address. Try [::].