[CentOS] IPV4 is nearly depleted, are you ready for IPV6?

> /me does not care. Not sure about other folks though...do them a service :-p

In theory, a lot of residential routers (not provided by the ISP) will
allow to set the sent MAC address via their web interface.

And on a full fledged Linux OS:
ifconfig ethX hw ether MY:MA:CA:DD:RE:SS
(or something like that, see man ifconfig)

I just did not say whether I have ever tried in real...