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.pollnow@sungard.se>
To: Baris Erdogan <bariswinston@yahoo.com>
Cc: pen-test@securityfocus.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
<bariswinston@yah
oo.com> To
Sent by: pen-test@securityfocus.com
listbounce@securi 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
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