Re: IP address blocks

In <slrnf9bgm1.4vu.this#is$really*my^address!@xxxxxxxxxxxxxxxxx>, on
Thu, 12 Jul 2007 01:57:21 -0400, Ron Parker,
this#is$really*my^address!@xxxxxxxxxxxx wrote:

However, a PTR lookup on the IP address shows that its canonical name
contains a number and the string "cg", which I took to mean it's a
dynamically assigned IP in or near Calgary. Looking up an IP from one of
Dennis's recent postings gave a similar but not identical result, containing
(if I remember correctly) the string "vc" which I took to be either Victoria
or Vancouver.

I'm seeing a "gv" which doesn't ring any bells off
the top of my head and "cg"... but my IP address seems
to indicate I'm in NY, so I always put a great deal of
skepticism in canonical hints like that, though certainly
at times they manage to be pretty accurate. How far are
you from pinevalley?

It is, however, in every way imagineable,
analogous to, and as precise as, a license plate number.

Except when proxy servers are in use and they're posting from a web
interface, of course, which is what they claim their ISP does. What a
crappy ISP that must be.

Well, if that's the case, there must be a WHOLE lot
of proxies. I grepped over 200,000 posts, and neither
of the IP addresses they're using showed up being used
by anyone else. If they're using proxies, they must
be dedicated ones... in which case, that's every bit as
useful as a non-proxified address in terms of
"identifying the vehicle you saw yesterday is the same
one you're seeing today."

(On the other hand, given that the canonical names look so much like those
traditionally given to dynamic IP pools,

They certainly do.
From a the point of looking at unique identifiers,
"dynamic" is really vague in this context. Dennis has
been posting here from 24.68.235.177 since 14 May...

We've lived here over a year now and have had only
two IPs in that time. The first one was for 10 months.
Dynamic just means you're not paying any extra money
to keep the same address, and that you never know when
it'll change next... and of course that a lot of ISPs
will block any port 25 traffic coming from you.

I'm not inclined to believe that
the trolls are telling the truth about the proxy server. I mean, after all,
their lips are moving as they type, right?)

I'm sure their lips are moving as they read too. ;-)
.

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