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List:       nmap-dev
Subject:    Re: Is -PB meant to take an argument?
From:       Fyodor <fyodor () insecure ! org>
Date:       2008-05-29 18:19:09
Message-ID: 20080529181909.GA30817 () syn ! lnxnet ! net
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On Wed, May 28, 2008 at 09:55:38AM -0600, David Fifield wrote:
> 
> Is the -PB option (default ping) supposed to take an argument? It does,
> and has since 2005-04-11 or earlier, according to Subversion. The
> argument is taken to be the list of ports to send ACK probes to, so
> 	nmap -PB75 target
> sends an ICMP echo and ACK to port 75.

Yes, it is supposed to have an optional argument for the port numbers
as you mention.  This behavior is like -PA, -PS, etc.

> If it's supposed to take an argument, I can't find it anywhere (and -PB
> isn't documented in the reference guide).

It is not documented because it is a deprecated feature.  It was
useful when you couldn't specify multiple host discovery option
arguments.  Now you might as well just specify "-PE -PA[ports".

We can probably get rid of -PB if we find a need to.

Cheers,
-F

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