# IPV6 problems **URL:** \ **Category:** NGINX\ **Created:** [June 25, 2011, 7:16am UTC](https://www.ruby-forum.com/t/ipv6-problems/208716 "2011-06-25T07:16:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![luislavena](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/l/0ea827/32.png) [@luislavena](https://www.ruby-forum.com/u/luislavena)\ **Post date:** [June 25, 2011, 7:16am UTC](https://www.ruby-forum.com/t/ipv6-problems/208716/1 "2011-06-25T07:16:14Z")
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. Posted at Nginx Forum: > **[IPV6 problems](https://forum.nginx.org/read.php?2,209857,209857#msg-209857)** > > 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,... ---
**Author:** ![syle](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b2d939/32.png) [@syle](https://www.ruby-forum.com/u/syle)\ **Post date:** [June 27, 2011, 11:59am UTC](https://www.ruby-forum.com/t/ipv6-problems/208716/2 "2011-06-27T11:59:07Z")
This being worked on? Hard to debug ipv6 at times without use of IPV6 address in browser… Dan. Posted at Nginx Forum: > **[Re: IPV6 problems](https://forum.nginx.org/read.php?2,209857,210384#msg-210384)** > > 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,... ---
**Author:** ![syle](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/b2d939/32.png) [@syle](https://www.ruby-forum.com/u/syle)\ **Post date:** [June 26, 2011, 12:37am UTC](https://www.ruby-forum.com/t/ipv6-problems/208716/3 "2011-06-26T00:37:52Z")
Hello! On Sat, Jun 25, 2011 at 01:15:53AM -0400, syle wrote: > 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… There are some missing parts in ipv6 address parsing in various places, notably $host will have incorrect value if you use ipv6 address in browser. Most likely it’s the issue you’re facing. Maxim D.