HOSTS file contains mappings of
IP addresses to host names. The
HOSTS file does not have any extension. It is just names as “
hosts ”. Some computers
running Windows operating system does contain
HOSTS file. Instead those
computers will have a file called “
hosts.sam ”, meaning sample file containing mappings
of
IP addresses to host names.
You can open the HOSTS file in any text edit such as NOTEPAD
and make the changes.
If you want to block certain sites, for example to block www.google.com, open HOSTS file using notepad
and add " 127.0.0.1 www.google.com " without double quotes at
the end of the line. Save the HOSTS file and open your favorite browser and
type " www.google.com " in address bar.
Now you can see the message " Page cannot be found ". If you are still able to browse the Google
page then restart the computer and again open the Google website in web
browser. " 127.0.0.1 " is the loopback IP address also called as local address pointing
to you own computer. In the above example you are directing IP address of the Google to your computer
To find the
IP address of the website, go to
START and click
on
RUN or hold the
WINDOWS key and press
R to open
RUN window. Type "
cmd " and
press ENTER key to open
DOS window. Now type
"
ping www.google.com " without double quotes to ping Google website to
find the
IP address.
You can increase the internet surfing speed by mapping IP
addresses to host names. Usually IP addresses to host names resolving is done
by DNS (Domain Naming Servers). Some times it takes time to resolve IP
addresses to host names using DNS. If that is the case, then you can use HOSTS
file to map IP addresses to host names. For example, if you want to map BING
website to Google website IP address then get the IP address of www.google.co.in
using PING in DOS window and type <IP address of Google> www.bing.com
It should look like " 74.125.236.48 www.bing.com " without
double quotes. Here 74.125.236.48 is the IP address of www.google.co.in
Now when you type www.bing.com
in the address bar of the browser it will direct to www.google.co.in
But remember the HOSTS file size is limited. You cannot add
a big list to block or map the websites.
In Windows/95/98/ME, HOSTS file is located at
C:\WINDOWS\HOSTS
In Windows NT/2000, HOSTS file is located at C:\WINNT\SYSTEM32\DRIVERS\ETC\HOSTS
In WindowsXP Home/Pro , HOSTS file is located at C:\WINDOWS\SYSTEM32\DRIVERS\ETC\HOSTS
NOTE: Always remember to take backup of your original HOSTS
file before making changes to it.