what would be the best way to monitor and block users from certain websites?

For example facebook has become an issue at our work place and HR would like to monitor the usage of it. Also what would be the best way to block facebook off our network?

Thank you for your advice in advance.

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creationtechAsked:
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kevinhsiehConnect With a Mentor Commented:
I use WebSense with my Cisco PIX/ASA firewall to monitor and block. A simple way to block (but not monitor per se) is to make your DNS server host a record for facebook.com.  That way any client using your DNS servers won't be able to connect because they will get the wrong information.  You could point facebook.com and www.facebook.com to your web server for example. It's free and takes only a few minutes.
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workgaConnect With a Mentor Commented:
I use squid proxy server for that.  I built a virtual machine with centos.  Installled squid and sarg.  All the routing of the internet goes through that and it loggs all the access.  With squid you can use acl and block access. now I know that microsoft have the internet service for proxy, however never looked at it.
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Yama23Connect With a Mentor Commented:
The best way to control all your internet user

Use ISA server

Build ISA server and you can have full contorl on every user
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bubbagump2002Commented:
Websense is the best option for filtering out websites, etc.  If you are a small shop they have a product "formally known as Surfcontrol" that is more up the small - med size, websense is more the medium to enterprise based on costs.

We use Websense here with our ASA's and ISA cluster proxies and it is a very stable and easy to manage product.
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uescompConnect With a Mentor Commented:
I use OpenDNS for most of my customers.  My favorite thing about it is that it is free.

http://www.opendns.com/

It won't have all the features that something like websense would, but it provides website blocking by category and custom domain whitelists / blacklists.  It also blocks malware sites.
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samroy2010Connect With a Mentor Commented:
Squid proxy is one option to block users from accessing particular websites.
Or if your network have routers like Cisco you can use Access Control List (ACL) to block particular websites(using IP address or URL).
There are network devices available in the market which has its main function as user access control over the internet.
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gengw2000Commented:
You can just block facebook domain in your router/firewall.

Or you can use an internet filtering program to do that:
websense: http://www.websense.com
WFilter: http://www.imfirewall.us

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creationtechAuthor Commented:
thanks to everyone's answer. There's no right answer here but i will examine each and will determine which answer is best suitable for our company and will reward those point to Expert.
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program.  See my comment at the end of the question for more details.
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