Hi Well, although I'd like to know it for both IIS and apache it's probably a decent start here... The way I understand it I have no IPV6 in my log file because my ISP doesn['t support it so the 1% of IPV6 addresses are converted/tunneled to IPV4 Now at some point in the future there will be IPV6 that cannot be converted, and I need to build a tool to manage this. Will I have a mix of IPV6 and IPV4 in my apache log file or will I have just IPV6 (if some layer is converting IPV4 to IPV6 always) ? Or is it something that can be chosen?