Since MySQL 5.5 it's possible to use IPv6, but why should you care? Since MySQL 5.5 you can configure MySQL to listen on an IPv6 address. The MySQL commandline utilities can connect to an IPv6 address. Storing IPv6 addresses is simple, just store them as a 128 bit integer. You can convert IPv6 addresses to numbers and back in your application. Your users will start to use IPv6 Your users might start to use IPv6 and you might need to store IPv6 addresses in your database. Since MySQL 5.6.3 you can use the INET6_ATON() and INET6_NTOA() functions. You could also store addresses as character string, but takes more storage and is less flexible. You need to learn to use IPv6 In a traditional 3-tier web platform the database is normally not directly accessed by the end users as the application server is the one accessing the database. Direct database access is probably used only for administration and/or reporting. If the loadbalancer is IPv6 enabled then the website is accessi...