From: Baris Erdogan (bariswinstonyahoo.com)
Date: Thu Feb 15 2007 - 08:17:34 CST

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I have sniffed the traffic when i have used -S option. No original IP address are sent over the network and destination system responds to spoofed IP address so nmap cannot capture TCP flags used in TCP packet. Thanks you all. Baris Erdogan ----- Original Message ---- From: Per-Fredrik Pollnow <per-fredrik.pollnowsungard.se> To: Baris Erdogan <bariswinstonyahoo.com> Cc: pen-testsecurityfocus.com Sent: Thursday, February 15, 2007 8:54:22 PM Subject: Re: nmap -S option If you read Nmap’s man page, under the –S option flag, you can see the “Note”: ///////////////////// Note that you usually won't receive reply packets back (they will be addressed to the IP you are spoofing), so Nmap won't produce useful reports. ///////////////////// For better understanding of IP-spoofing: http://www.securityfocus.com/infocus/1674 (http://www.packetstormsecurity.org/spoof/ip-spoof-guides/IPSpoofing.txt) MvH Per-Fredrik Pollnow SunGard/iXsecurity Baris Erdogan <bariswinstonyah oo.com> To Sent by: pen-testsecurityfocus.com listbouncesecuri cc tyfocus.com Subject nmap -S option 02/14/2007 10:13 Hello, When i use "nmap -sS targetaddress -S spoofaddress -e eth0" command, nmap does not show open ports at end of scan. i wanna know whether this is normal case or not. do i misuse nmap options? Because when i use nmap with "nmap -sS targetaddress", nmap shows me open ports at the end of scan. Thanks, Kind regards, Baris Erdogan ____________________________________________________________________________________ Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now. ------------------------------------------------------------------------ This List Sponsored by: Cenzic Need to secure your web apps? Cenzic Hailstorm finds vulnerabilities fast. Click the link to buy it, try it or download Hailstorm for FREE. http://www.cenzic.com/products_services/download_hailstorm.php?camp=701600000008bOW ------------------------------------------------------------------------ ____________________________________________________________________________________ Get your own web address. Have a HUGE year through Yahoo! Small Business. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL

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