controlling cern-httpd-proxy

[Tom Kozlowski <tkozlows @ AGSM . UCLA . EDU>]

Any ideas would be appreciated on the following question.

I am currently running cern-httpd as a WWW proxy on Solaris
2.4. I would like to be able to block some of the "unwanted" internet
sites via this cern-httpd proxy. For example, so that users cannot
access www.playboy.com from local Netscape browser and so on.
Is it possible? Has anyone done it?

I would be curios to know how other sites are dealing with this
issue.

Thanks in advance.

Tom