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Re: [PLUG] fire wall question(s)
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> Now this is useful. What can be done with simply an open port number?
If nothing is listening on that port, not a lot, I think, since the traffic would come to the port, but nothing would process the traffic. Conside the IDENT (or AUTH) port (113). I know people who open that port on their firewall, but never run an IDENT daemon. So, to the other side, it's a timeout .. and not a direct REJECT, which some places don't like.
I suppose it could be made into a DOS.
> Also, is there software I can get for my Linux box that I can use to port
> scan my Windows box? What about a packet sniffer (?) to watch all traffic
> on and into/out of my network?
nmap is available for Linux and for Windows; it's pretty much a standard port-scanner. And Ethereal is a free Windows-based packet sniffer, altho it doesn't handle all types of packets (no PPPOE, I'm told, amongst other kinds).
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