Normally how I setup nginx is to proxy php/perl to apache sitting on port 81, for ipv6
its also a proxy pass for perl/php to some upstream local ipv4 address.

For ipv6 when typing in a domain in browser utilizing a ipv6 address all works just fine,
but if I use a IPV6 IP address in the browser I get:

400 Bad syntax.

this is only for the proxy to apache for php/perl requests.

Can someone look into this issue why number(hex) addresses in browser will not work
while domains going to IPV6 do...

Dan.