I don't know all that much about this; I just pretend to.
For firewalls, I think that the idea is to block ports that software you run doesn't use.
I suppose that I had considered a router to be a hardware-firewall, with the computers connecting to the hub/switch which connected to the modem which connected to the router. I haven't tinkered with them though, so I don't really know.
I've traditionally had the 'little fish, big pond' variant of: "I'm a little fish on a 56k modem and I usually don't receive email attachments."
Lovebugz; I imagine that there are probably a lot of us here that don't know much of this.
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