For my link archive: [WayBack] browser – How to connect a website has only IPv6 address without domain name? – Super User (thanks haimg):
According to RFC2732, literal IPv6 addresses should be put inside square brackets in URLs, e.g. like this:
If you also need to specify a port other then 80 to access the server it has to be placed after the closing bracket:
Of course, you have to have end-to-end IPv6 connectivity to that host. E.g. if the server is not inside your own local network, you need to have IPv6 connectivity, either via your ISP (rare), or via some kind of IPv6 in IPv4 encapsulation (tunnel).
Related: [WayBack] RFC 2732 – Format for Literal IPv6 Addresses in URL’s
–jeroen