i'm not familiar with your router, but if you can establish egress filters for outbound traffic from the client workstations, you pretty much nip this in the bud quickly. setup a filtering proxy for web and make allowances for that one host. and inform your employees in writing of the nature and severity in which violations will be dealt with. if/when someone figures a way around it (ie, externalized web-based proxies, etc) - chop off their hands and feed their young to the toilet trolls....and take pictures.
the last part's an obvious joke - but seriously the best way to prevent this is to make it unaffordable to violate.
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by: stevenshealthcarePosted on 2004-05-28 at 12:00:21ID: 11183218
You can install a proxy server and then load the appropriate software that meets your criteria. From what you have listed this may be the software for you or something of this nature. dex.asp com/spam-l /blocking. html
http://www.winproxy.com/in
As for removing spam from emails you may need a different software suite.
This link provides some insight on how to do this as. It also addresses cost issues. Read Linux.
http://www.claws-and-paws.
David