Network virus scan

[fractilian]

Ok I want to set up a computer to scan everything as it comes in my network. I was thinking of a computer with two network cards inbetween my router and the rest of the network. What kind of software would be best and how would this effect network speed? This isnt a hardcore network...just a couple of computers but the users of some of the computers don't know shite about these things. Because of this I want to try to scan things before it even gets to their computers. This way they wont call me all the time. Another though: Would it be better to direct all email to a computer with Norton on it and then send it out form there? Any ideas\info would be great. Thanks

 

[InlineFive]

What OS' are they using?

 

[fractilian]

W2K and one has Win ME on it.