https://winhelp2002.mvps.org/hosts.htm
ou can use a modified HOSTS file to block ads, banners, 3rd party
Cookies <
https://winhelp2002.mvps.org/cookies.htm>, 3rd party page
counters, web bugs <
https://en.wikipedia.org/wiki/Web_beacon>, and even
most hijackers and possibly unwanted programs. This is accomplished by
blocking the connection(s) that supplies these little gems. The Hosts
file <
http://en.wikipedia.org/wiki/Hosts_file> is loaded into memory
(cache) at startup, so there is no need to turn on, adjust or change any
settings with the exception of the DNS Client service (see below
<
https://winhelp2002.mvps.org/hosts.htm#DNS>). Windows automatically
looks for the existence of a HOSTS file and if found, checks the HOSTS
file first for entries to the web page you just requested. The *0*.0.0.0
(prefix) is considered the location of your computer, so when an entry
listed in the MVPS HOSTS file is requested on a page you are viewing,
your computer thinks 0.0.0.0 is the location of the file. When this file
is not located it skips onto the next file and thus the ad server is
blocked from loading the banner, Cookie, or some unscrupulous tracker,
or javascript file.
Example - the following entry *0.0.0.0*
ad.doubleclick.net blocks all
files supplied by that DoubleClick
<
http://en.wikipedia.org/wiki/Doubleclick> Server to the web page you
are viewing. This also prevents the server from tracking your movements.
Why? ... because in certain cases "Ad Servers" like Doubleclick (and
many others) will try silently to open a separate connection
<
https://winhelp2002.mvps.org/doubleclick.gif> on the webpage you are
viewing, record your movements then yes ... follow you to additional
sites you may visit.
Using a well designed HOSTS file can speed the loading of web pages by
not having to wait for these ads, annoying banners, hit counters
<
http://en.wikipedia.org/wiki/Hit_counter>, etc. to load. This also
helps to protect your Privacy and Security by blocking sites that may
track your viewing habits, also known as "click-thru tracking" or Data
Miners <
http://www.webopedia.com/TERM/D/data_miner.html>. Simply using a
HOSTS file is not a cure-all against all the dangers on the Internet,
but it does provide another very effective "Layer of Protection".
In case you're wondering ... this all happens in microseconds, which is
much faster than trying to fetch a file from half way around the world.
Another great feature of the HOSTS file is that it is a two-way file,
meaning if some parasite does get into your system (usually bundled with
other products) the culprit can not get out (call home) as long as the
necessary entries exist.
--
Pity the fool who followed his GPS over the cliff