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Re: Testing firewall ports with parallel

From: Gilles LAMIRAL
Subject: Re: Testing firewall ports with parallel
Date: Fri, 19 Jan 2018 23:09:04 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

Hi Divan,

nmap is also a very good candidate to scan many many hosts in parallel, by 
which is still combinable with parallel when the command line length might be 

Basic nmap command for a scan of port 443 only:

  nmap -p 443 

You'll be very surprised how fast nmap is, a single host is
usually enough for thousands scans at one time.

This solution force you to group scan by port.

Need help, am trying to test if servers we manage have the required
firewall ports open. Have tried a few things but am not winning so far.

This works, but is quite terrible and inefficient. Sure it could be
simpler and better.

Au revoir,
Gilles Lamiral. France, Baulon (35580)
mob 06 19 22 03 54
tel 09 51 84 42 42

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