I would recommend Zone Alarm Pro, which has settings that work with Linksys
Routers on a network. It not only blocks unwanted traffic, but will not
allow any workstation to access the Internet if they shut down Zone Alarm.
It's available at www.zonelabs.com. 

Also for VPN, I have struggled to get it to finally work, but I found a much
easier solution, Real VNC. It's easy to use, makes a very small footprint
and has no security issues that I have found. If I was transferring
sensitive information from a bank headquarters to a branch office, I'd stick
with VPN, but for most businesses, VNC will work just fine. It is freely
available at: http://www.uk.research.att.com/vnc/index.html

Larry A. Kaduce

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