From owner-freebsd-questions  Tue Jun 26 13:27:12 2001
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Date: Tue, 26 Jun 2001 16:26:09 -0400
From: Daniel Frazier <dfrazier@magpage.com>
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To: Peter Brezny <peter@sysadmin-inc.com>,
	freebsd-questions@FreeBSD.ORG
Subject: Re: dns tool for reverse lookup of network range needed
References: <NFBBKAEAALGGGFKINBLAIEENCAAA.peter@sysadmin-inc.com> <3B38EED3.F5E33696@magpage.com>
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Daniel Frazier wrote:
> 
> Peter Brezny wrote:
> >
> > Is there a too for freebsd that could help with checking the reverse lookup
> > of an entire subdomain?
> >
> > I looked around in the man page for dig, and saw the -f [file] option, but
> > i'd still have to setup a file with each ip in it...
> >
> 
> how about this...
> 
> $ x=0; while [ $x -lt 255 ]; do echo $x; host 216.155.24.$x; x=`echo "$x + 1" | bc`; done
> 
> this'll do a whole class c.  modify the original value of x and the number
> in the test command to narrow the range of ips checked.
> 

eh, you can take out the "echo $x" to make the output a bit more readable.

$ x=0; while [ $x -lt 255 ]; do host 216.155.24.$x; x=`echo "$x + 1" | bc`; done

-- 
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Daniel Frazier  <dfrazier@magpage.com>   Tel:  302-239-5900 Ext. 231
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