I'm planning to run my hostings in the IPV4/IPV6 dual stack mode for a lot of hostings / IPs. Short Apache example:
ports.conf
Listen 199.192.201.82:80
NameVirtualHost 199.192.201.82:80
Listen [2607:ff50:0:21::2]:80
NameVirtualHost [2607:ff50:0:21::2]:80
VirtualHost config
<VirtualHost 199.192.201.82:80 [2607:ff50:0:21::2]:80>
I think, that's the common and recommended way. But maybe you have some experience with the integration of IPV6 on existing hostings and know a better way?
for example to forward IPV6:80 with iptables to IPV4:80? or to use rinetd?
Cheers