Penetration Testing mailing list archives
Re: Discovering Live Hosts
From: "Nikhil Wagholikar" <visitnikhil () gmail com>
Date: Wed, 8 Aug 2007 10:45:05 +0530
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/
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Current thread:
- Discovering Live Hosts Nikhil Wagholikar (Aug 07)
- Re: Discovering Live Hosts rajat swarup (Aug 07)
- Re: Discovering Live Hosts Nikhil Wagholikar (Aug 07)
- Re: Discovering Live Hosts rajat swarup (Aug 07)
- Re: Discovering Live Hosts rajat swarup (Aug 07)
- Re: Discovering Live Hosts pand0ra (Aug 08)
- Re: Discovering Live Hosts Nikhil Wagholikar (Aug 07)
- Re: Discovering Live Hosts rajat swarup (Aug 07)
- Re: Discovering Live Hosts Jure Krasovic (Aug 07)
- Re: Discovering Live Hosts Nikhil Wagholikar (Aug 07)
- Re: Discovering Live Hosts John M. Martinelli (Aug 07)
- Re: Discovering Live Hosts Vivek P (Aug 08)
- Re: Discovering Live Hosts Lee Lawson (Aug 08)
- Re: Discovering Live Hosts Nikhil Wagholikar (Aug 07)