Quoting "Kevin A. McGrail" kmcgrail@pccc.com:
IMO, he makes a good point. I've seen and used http://10.10.10.1 and http://192.168.1.1/, etc. We can probably just whitelist the 10.X and 192.168.X.
Those would probably never get blacklisted since they're useless on the Internet
Jeff C.