Re: Nmap

All depends on what you are trying to achieve. I would assume that you are not concerned about monitoring devices seeing you have done a ping sweep with nmap. I agree with others a port scan is going to give you the best idea if a host is active. There are Many instances filtering devices can drop icmp or respond for hosts behind them. Open ports and services are the best identifiers. A port has to be open in some form (open or filtered) to interact with in-bound connections. I would recommend a -sS (syn) scan you can opt for standard services or add -p1- for all 65k+ ports. All ports will verify and services/demons running. There are other options if bandwidth is an issue.


On Sep 30, 2011, at 5:17 PM, Ukpong <ukpong.ukpong@xxxxxxxxx> wrote:

Can somebody suggest the best NMAP commands for identifying hosts that
are not responding to ICMP ping requests ?

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