The IPv4 Cleanup Project
Anything extending the life of IPv4 is actively harmful.<p>(Like I said last time this was posted.)<p>The most important problem with IPv4 is that it mandates 1:N NAT configurations that break direct connectivity between devices on the Internet. Yes you can traverse NAT but it&#x27;s an ugly and often unreliable hack. This of course is because the address space is too small for everything to have an IP, whether global or 1:1 NATed.<p>Difficult peer to peer connectivity means everything has to have a server. You can&#x27;t just write communication apps that... communicate. The added cost here is enormous both in money and in privacy&#x2F;security.<p>IPv4 is also too small for <i>private</i> networks. Corporate networks are often full of hideous hacks like multiple NATs that negotiate interoperability between networks with overlapping 10.x address spaces, &quot;theft&quot; of unused IPv4 space such as US DoD addresses, etc.