Re: Nmap oprions

[Eric Smith <defcon47 () yahoo com>]

This is one way of identifying all hosts with port 21
open. The ipfile.txt should have a single IP address
on  each line. The nmap.all will contain all output in
a grepable form.

nmap -sS -P0 -p 21 -oG nmap.all ./ipfile.txt

Then to identify which hosts had the open port

grep open nmap.all

Hope this helps.

--- Juan B <juanbabi () yahoo com> wrote:

> HI,
>
> I need to scan my big network for port 21 on many
> hosts.
>
> I want that nmap will show me just the hosts which
> the
> port found open. I know that I can do this with grep
> but im not sure about the syntex.
>
> can some one please help.
>
> thanks.
>
> J
>
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