Blocking a website?

Hi,


How would I go about blocking a website so that users of a group of networked computers would not be able to access. Or where could I find information on how to do this?

Thanks
cullenswoodAsked:
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simonenticottConnect With a Mentor Commented:
the easiest way is to add an entry in your DNS server for the website with an incorrect IP address, if you dont use DNS you could add it the hosts file.

Alternatively if you want a commercial solution you can use a product like Surf Control which sits on and actively sniffs the network and blocks websites in real time based on classifications that you can manipulate, I don't know how it works but its very clever and effective.
 
Simon,
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rafael_accConnect With a Mentor Commented:
What environment are we talking about here? Is it windows, is there any domain, are you using any firewall, which one?

Cheers
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elbereth21Connect With a Mentor Commented:
It depends on what you intend to do: probably,if you have to block a bunch of sites, your best option is to set up a web proxy:
 http://www.microsoft.com/isaserver/  for ISA Server,
or, if you prefer not to spend a buck: Squid http://www.squid-cache.org/
If you intend to only block a single site, not a complex, hard to maintain list, you can also create an access control list to your firewall, or even change your HOSTS file on windows clients and distribute it. Here you'll find some more details on how to do it:
http://www.experts-exchange.com/Operating_Systems/Windows_Server_2003/Q_21260868.html
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ahoffmannConnect With a Mentor Commented:
> .. so that users of a group of networked computers
1. block IP of website in question at your firewall for this network
2. enshure that no proxies or other tunneling techniques can be use from computers  on this network

while 1. above is simple, 2. will be hard to do (depending on your policies)
better you can enforce each computer to use your proxy (see previous comment)
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ZabagaRCommented:
Are you using Internet Explorer?

How about just going to:
---->Tools - Internet Options - Security - Restricted Sites

Add the site you want to block.

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Yan_westConnect With a Mentor Commented:
Also, if you can get a Linux box, you could install Squid Proxy, wich is FREE, and works like a charm. it has extensive access controls...



http://www.squid-cache.org/
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2hypeConnect With a Mentor Commented:
I use IPCOP as a firewall/Proxy.  It is easy to install and you can download urlfilter as an addon and you can block websites. Really easy to install you just download the ISO and install a clean install on a machine.  It has a web GUI interface.

www.ipcop.org
www.urlfilter.net
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