I just got a few emails from an administrator of a medium-sized company, asking some IPv6 questions. They want to use IPv6 to reach the Internet, using two ISPs, while remaining IPv4-only on their internal networks. For whatever reason, they came across three different ideas that were almost completely wrong, speaking of a sound IPv6 design. But why? Maybe because IPv4 thinking is a bigger problem than we ever thought? Or because admins rely on firewall vendors (like Fortinet) that suggest completely wrong network approaches?
Let’s dig into some misconceptions concerning IPv6:
