Re: Anyone using Earthlink!

On Sun, 4 Dec 2005, in the Usenet newsgroup comp.security.firewalls, in article
<leb5p199di5841jma16qidhdtvl1jbdst9@4ax.com>, Alec wrote:

>She has three time asked them for her IP address She has been given an
>address 172 xxx xxx xxx. Does not work. Pinged no response.

What's preventing her from asking her own computer what address it is using?
If you are using windows NT, w2k, or XP, the command "ipconfig /all".
If you are using Windows 9X, ME then winipcfg and the more button.

>I have asked her to check with WHAT IS MY IP, as I did for my own and
>she came up with two addresses that did not work. Beginning 66.XXX XXX
>XXX. My guess one could her machine and the other the ISP's address
>for her.

In your zeal to hide the IP information, you over did it. But let's see:

[compton ~]$ grep ' 172\.' IP.ADDR/stats/[ALR]*
IP.ADDR/stats/ARIN.gz:US 172.128.0.0 255.192.0.0 allocated
IP.ADDR/stats/ARIN.gz:US 172.192.0.0 1638400 allocated
[compton ~]$ grep -c ' 66\.' IP.ADDR/stats/[ALR]*
IP.ADDR/stats/AFRINIC:2
IP.ADDR/stats/APNIC:0
IP.ADDR/stats/ARIN:754
IP.ADDR/stats/LACNIC:3
IP.ADDR/stats/RIPE:0
[compton ~]$

So, for the 66.XXX.XXX.XXX block, there are 759 ISPs around the world that
have assignments. Pretty useless. On the other hand, ARIN has only two
blocks assigned, which combined are 172.128.0.0 to 172.216.255.255, and
those belong to AOL. I rather doubt that's what you are referring to, but
there is a third address block not listed:

>I did a reverse check on the two numbers and they went back to
>Earthlink. The other went back I recal to some address in California
>
>OrgName: Internet Assigned Numbers Authority
>OrgID: IANA
>Address: 4676 Admiralty Way, Suite 330
>City: Marina del Rey
>StateProv: CA

  1918 Address Allocation for Private Internets. Y. Rekhter, B.
       Moskowitz, D. Karrenberg, G. J. de Groot, E. Lear. February 1996.
       (Format: TXT=22270 bytes) (Obsoletes RFC1627, RFC1597) (Also BCP0005)
       (Status: BEST CURRENT PRACTICE)

  3330 Special-Use IPv4 Addresses. IANA. September 2002. (Format:
       TXT=16200 bytes) (Status: INFORMATIONAL)

   172.16.0.0/12 - This block is set aside for use in private networks.
   Its intended use is documented in [RFC1918]. Addresses within this
   block should not appear on the public Internet.

That's 172.16.0.0 through 172.31.255.255. Those addresses are normally
used behind NAT routers. You can't connect to them from the Internet,
because they are not assigned to any one entity, and can be used, like
the more familiar 10.0.0.0 - 10.255.255.255 and 192.168.0.0 - 192.168.255.255
range at homes.

>I reckon some support guy may have got it wrong with the 172 number,
>gave had information to my colleague.

No, 172.16.0.0/12 is handed out for systems that do not need to be
contacted directly by someone else on the Internet. Sounds as if your
friend is NATed and not directly reachable from the world, although she
can reach OUT to the world.

        Old guy
Received on Sun Dec 11 14:24:13 2005