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ambiguity about nmap results
From: "sara fink" <sara.fink () gmail com>
Date: Fri, 30 May 2008 21:47:55 +0300

I tried to use nmap from this web site:  http://www.nmapyourself.com/.

If I try to run nmap on my external ip say at range 1-1024 with flag -sT I get
Starting Nmap 4.20 ( http://insecure.org ) at 2008-05-30 14:42 EDT
Interesting ports on some ip .:

Not shown: 1022 closed ports
0/tcp   filtered unknown
139/tcp filtered netbios-ssn
445/tcp filtered microsoft-ds

To check myself again, I connected via ssh to some other site and from
there ran nmap -sT -p 1-1024 ip

From there I got a completely different result. Almost all the 1025
ports are open except very few.

Someone can explain me why I get such a difference?

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