From: Nikhil Wagholikar (visitnikhil@gmail.com)
Date: Wed Aug 08 2007 - 01:15:05 EDT
Hello Rajat,
Thanks for your suggestion. However as I said earlier that "if suppose SMTP is
configured on port 26 instead of traditional port 25, then it would
add a twist to this situation". Hence your suggested method would
still leave some hosts down. Can you kindly further granularize your
suggestion?
Thanks once again.
-- Nikhil Wagholikar Information Security Analyst On 8/8/07, rajat swarup <rajats@gmail.com> wrote: > On 8/7/07, Nikhil Wagholikar <visitnikhil@gmail.com> wrote: > > > > > > Can anyone kindly guide me, as to how to find live IP Addresses from a > > given Pool of IP Addresses (Range of IP Addresses) with as less false > > positive results as possible and as quickly as possible? Is there any > > tool out (no matter shareware or freeware), which focuses on finding > > live IP Addresses from Pool of IP Addresses? > > > Hi Nikhil, > I would choose some 40-50 odd most commonly used ports and perform a > SYN Stealth scan only on those ports -sS -P0 (e.g., > 21,22,23,25,53,80,443,3389,9000 etc). > I'd also do a ping scan. > Now there are 4 possibiities: > 1. A host responds to ping > 2. A host responds with open port > 3. A host responds with a closed port > 4. A host resolved DNS name > In each of the four cases you come to know the host is alive. > > HTH, > Rajat. > -- > Rajat Swarup > > http://rajatswarup.blogspot.com/ > ------------------------------------------------------------------------ This list is sponsored by: Cenzic Need to secure your web apps NOW? Cenzic finds more, "real" vulnerabilities fast. Click to try it, buy it or download a solution FREE today! http://www.cenzic.com/downloads ------------------------------------------------------------------------
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