IPv4 and IPv6 addressing now fully enabled

As announced in the previous post, we are going to enable dual-stack address resolution in the server network (SRV) now for all VMs.

The new scheme goes as follows (as already announced):

• vm.gocept.net resolves to both IPv4 and IPv6 addresses,
• vm.ipv4.gocept.net resolves only to IPv4 addresses,
• vm.ipv6.gocept.net resolves only to IPv6 addresses.

Please note that private IPv4 address will not be visible outside our data center. In this case, our DNS servers will respond only with IPv6 addresses to queries from the public Internet.

However, the private IPv4 addresses can be used for connections inside our data center. When queried from the inside, our DNS servers will happily provide private IPv4 addresses as well. Thus, there is no need to use hard-coded IP addresses instead of proper DNS names in service configurations.