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I dunno.. personally for me, Security on my homecomputer has never been a problem...

I'd lock down ports, and open what I had too... then i'd run IPPL and snort... and that wasit..

if you wanna watch what's coming into your own computer a nice neat lil program is ippl... it's available threw freshmeat..

a good sniffer is Ethereal if you wanna watch you're whole network
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