UnrealIRCd Forums

The differences are many.

The only way a user can use IPv6 on your network, is if their ISP allows IPv6 I believe (Not sure on this, cause I've never touched it)

Google for IPv6 if ya wanna take a look at the changes

http://en.wikipedia.org/wiki/Ipv6

(Check out the "external links" at the bottom, too)