Carey Fisher wrote:

> Just using the router for a firewall.  

One reason for using a local firewall is to have better control over the
outgoing connections from your machine.

> I've scanned it from outside and no ports are open except VNC & SKYPE. 

What ports do you open for Skype? I use it, and never opened any ports for
it.

> Also, I've set the DHCP on the DSL Modem to reset every hour.

Which doesn't help if you have a trojan on your machine...

I'm not sure whether this is too obvious, but do you know all processes
that run on your machine?

Gerhard

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