Are 150.150.*.* adresses private or reserve addresses? My friend has a one, and I tried doing an nslookup, ping, and traceroute with no luck.
Private address space is defined in RFC1918 (see http://www.faqs.org/rfcs/rfc1918.html):
3. Private Address Space
The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)That is, all addresses beginning with 10., all beginning with 172.16. through 172.31. and all beginning with 192.168. are private. You should NEVER use other addresses in your private LAN since that can cause trouble for you (and normally only you). A customer of mine had set up a private LAN with addresses belonging to Pittsburgh board of electricity which would cause their LAN to believe that requests to Pittsburgh were local so they couldn't be routed out of their office. Not that a swedish company would ever be interested in Pittsburgh board of electricity, but you never know what problems could occur. (Say for instance that Pittsburgh board of electricity hosts the DNS servers for a company that you really want to contact...)
On the other hand you should be aware that these addresses won't be routed on the Internet and can therefore be used alongside with your public IP addresses for switches or other kinds of equipment that you don't need to be globally, but only locally available.
/Fredrik
