[linux-elitists] Sick of doubleclick.net yet?

Heather star@betelgeuse.starshine.org
Tue Jul 4 10:55:23 PDT 2000

> I think these were actually the addresses ad.dc.net would resolve to:
> 62 82 102 142 182
> 70 90 130 170 210
> 103 105 106
> These are some of their ARIN netblocks, scattered to prevent anyone
> from firewalling them out. 15 brownie points if anyone can tell me
> why I X'd three of them.
>   NETBLK-UU-63-77-79-192 -
>   NETBLK-SPRINT-3FA036-1 -
>   NETBLK-FON-106786867245939 -
>   NETBLK-UU-204-178-112-160 -
> X NETBLK-UU-204-253-104 -
>   NETBLK-UU-208-203-243 -
>   NETBLK-UU-208-211-225 -
>   NETBLK-UU-208-228-86 -
>   NETBLK-CYPC-2162306564 -

Heh.  This is a pretty short list if they think we can't block 'em.
> I think that was the weekend I stumbled onto this mailing list,
> searching for anti-dc material, I wandered onto that nifty
> little authoritative DNS trick. Using a similar method, I aliased
> to around 20 of the major ad servers in /etc/hosts.

I've been doing this for a long while, including, since I run a localhost
web server to aid my Gazette editing, I added a server on which
does only one thing - returns *my* banner, on a 404 not found, which of
course it's guaranteed to get.

First time someone in the house noticed was a great laugh, too :) "Heather!
We got an ad on Yahoo??!?"  "No, I prevented some webspam appearing to be
from Yahoo."

As a particular advantage, the layout tends to remain as the web artist 
intended, and I can easily spot ads which have not succumbed to Replacement
yet.  And, I know this is weird, but it also favors the ads that small sites
choose to maintain on their own, eg slashdot.  Well, ok, they're not small
any more.  You get what I mean though.  As an elitist amusement, sometimes
the replaced ads are not of banner size, but they forget to declare.  Result
is not as artist intended.  But it is often funny!

> Was blocking probably 50% of the ads on a typical page. But I've since
> moved back to the network-wide BIND tactic, to save my coworkers from
> the evils of DC.

A combination can be used easily :)  
	ads.doubleclick.net   A

But the perl script Don Marti whipped up in ages past, to eat graphics
of the advertisement preferred sizes, is pretty good.  Of course you'll
find you're missing my site's secondary header bars, since I used my 
"banner" to the purposes of good...

* Heather * As in certain cults it is possible to kill a process 
            if you know its true name.  -- Ken Thompson and Dennis M. Ritchie

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