disabling the Internet access but let the emails come in

I need to block web access and messenger to some of computer.
is there way to do this without installing firewall software to computers.
it cost denero.
My company router is netopia R9100 it seems that it doesn't have ip address block for only certain ip.
company computers are all XP Pro.

kspidermanAsked:
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David Johnson, CD, MVPOwnerCommented:
on the router use port forwarding .. route port 80 http to an unused ip address.
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kspidermanAuthor Commented:
would it block out all the computer in the company ????
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itguyrgCommented:
Another option is to uninstall Internet explorer and windows messenger from add/remove programs / add/remove windows components.  But this you will have to do this on each machine.
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David Johnson, CD, MVPOwnerCommented:
Yes blocking port 80 or forwarding it to an unused ip port will block all incomping tcpip packets on port 80 (http) from all computers in the company.
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David Johnson, CD, MVPOwnerCommented:
you could also configure each ip address independantly to block each ip address on port 80 i.e. do not forward to 192.168.0.100 new rule do not forward 80 to 192.168.0.103 etc.. This document might help http://www.netopia.com/support/hardware/technotes/NQG_039.html
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jdfloryCommented:
Through group policy or local policy add a bogus proxy server.  This will only effect browsing but will still allow other ip fuctions to access the internet.  This way you rclint machine will still be able to get virus updates, windows updates and be able to use an email client like outlook to retrieve email.
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JohnBPriceCommented:
>>it cost denero.

There are free firewall applications.  Zone Alarm is only free for personal use, but there are others, google free firewall.

http://www.personalfirewall.comodo.com/ was near the top
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