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Re: Testing firewall ports with parallel

From: Divan Santana
Subject: Re: Testing firewall ports with parallel
Date: Tue, 23 Jan 2018 13:14:51 +0200

Hi Gilles,

Great. Thanks for the useful tip.

Gilles LAMIRAL <address@hidden> writes:

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


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