Re: ProxyPass directive fails on IPv6 address: (Apache Users)

Thought I should mention in case anyone else is having trouble:

It occurred to me right when I sent my email out that my version of Apache might simply not support IPv6. Turns out I was right. It's weird that the CentOS 6 bundled yum sources provide an IPv4 -only Apache but it is what it is. Perhaps I will try to find a Fedora source for Apache 2.4.

Thanks,

Nader

On Sun, Jun 29, 2014 at 5:18 PM, Nader Zeid <nader.zeid@xxxxxxxxx> wrote:

I'm using Apache to front-end some servers listening on loopback but the ProxyPass directive doesn't like IPv6 addresses.

I spin up a server on IPv6 address [::1]:8001, confirmed working using cURL and shown here on nestat:

tcp 0 0 ::1:8001 :::* LISTEN 1348/./WebToolsTest

I use the following ProxyPass directive:

ProxyPass / http://[::1]:8001/
ProxyPassReverse / http://[::1]:8001/

However, when I try to connect using any HTTP client, I get the following error in logs:

[Sun Jun 29 21:12:40 2014] [error] [client 24.228.250.155] proxy: DNS lookup failure for: ::1 returned by /

When I switch everything to IPv4, i.e. bind the back end to 127.0.0.1:8001 and switch ProxyPass, everything works fine.

Why would mod_proxy accept IPv4 addresses but not IPv6? Why is it doing a DNS lookup on IPv6 addresses?

Thanks,

Nader