- Carrier-grade NAT forces users to share IPv4 addresses, making it difficult to ban offenders without collateral damage. This problem is only going to get wor

- Carrier-grade NAT forces users to share IPv4 addresses, making it difficult to ban offenders without collateral damage. This problem is only going to get worse. - NATs are full of state, and state is messy. Making your site route around them may improve performance. - This is one of the few areas where software people can directly make the world a better place, by preventing "our" Internet from regressing into something that more resembles the telco network. - Lack of IPv6 support strains the credibility of companies that purport to be on the forefront of technology. Google, Facebook, and Wikipedia (and Bing?!) figured this out; why can't Hacker News? - It gives your site a green 6 in IPvFoo, instead of a red 4. Six is 2 better than four, and green is 100THz better than red.