[wellylug] nmap

[Nigel Roberts]

Nope, it's nmap.

From the man page for nmap (you know I'm doing your work for you... :)

-T <Paranoid|Sneaky|Polite|Normal|Aggressive|Insane>

These are canned timing policies for conveniently expressing your
pri-orities to Nmap.  Paranoid mode scans very slowly in the hopes of
avoiding detection by IDS systems.  It serializes all scans (no paral-
lel scanning) and generally waits at least 5 minutes between sending
packets.  Sneaky is similar, except it only waits 15 seconds between
sending packets.  Polite is meant to ease load on the network and
reduce the chances of crashing machines.  It serializes the probes and
waits at least 0.4 seconds between them.  Note that this is generally
at least an order of magnitude slower than default scans, so only use
it when you need to.  Normal is the default Nmap behavior, which tries
to run as quickly as possible without overloading the network or miss-
ing hosts/ports.  Aggressive This option can make certain scans (espe-
cially SYN scans against heavily filtered hosts) much faster.  It is
recommended for impatient folks with a fast net connection.  Insane is
only suitable for very fast networks or where you don't mind losing
some information.  It times out hosts in 15 minutes and won't wait
more than 0.3 seconds for individual probes.  It does allow for very
quick network sweeps though :).

Cheers,
Nigel


On Wed, 11 Aug 2004 at 05:41:22 +1200, Andrej wrote:

> On Wed, 11 Aug 2004 00:00, Michael Dittmer wrote:
> > I'm sitting here cursing how slow nmap is when scanning all
> > 65535 TCP and UDP ports.
> >
> > Even on a 2MB Cable connection scanning another 2MB Cable
> > connection it is slow.
> Chances are that it's not nmap but the tcp/ip stacks
> in-built time-outs that hold you up, mate.
> 
> 
> Cheers
> 
> 
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