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Difference between windows and linux output
From: Mads Johansen <mazterthe () hotmail com>
Date: Tue, 9 Jun 2009 11:23:55 +0200


Hello list!

When you enter the same command on Windows (xp) and Linux (ubuntu 8.04.2) you does not get the same output. See example:

Linux:
./nmap -v -v -p1-20000 192.168.0.1

Starting Nmap 4.85BETA9 ( http://nmap.org ) at 2009-06-09 11:13 CEST
NSE: Loaded 0 scripts for scanning.
Initiating Ping Scan at 11:13
Scanning 192.168.0.1 [1 port]
Completed Ping Scan at 11:13, 0.00s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 11:13
Completed Parallel DNS resolution of 1 host. at 11:13, 0.06s elapsed
Initiating Connect Scan at 11:13
Scanning 192.168.0.1 [20000 ports]
Discovered open port a/tcp on 192.168.0.1
Discovered open port b/tcp on 192.168.0.1
Completed Connect Scan at 11:13, 3.11s elapsed (20000 total ports)
Host 192.168.0.1 is up (0.020s latency).
Scanned at 2009-06-09 11:13:20 CEST for 3s
Interesting ports on 192.168.0.1:
Not shown: 19830 closed ports, 168 filtered ports
PORT      STATE SERVICE
a/tcp    open  unknown
b/tcp open  unknown

Read data files from: .
Nmap done: 1 IP address (1 host up) scanned in 3.29 seconds


Windows:

nmap.exe -v -v -p1-20000 my.public.IP.here

Starting Nmap 4.85BETA9 ( http://nmap.org ) at 2009-06-09 11:06 Rom, normaltid
NSE: Loaded 0 scripts for scanning.
Initiating Ping Scan at 11:06
Scanning my.public.IP.here [2 ports]
Completed Ping Scan at 11:06, 0.22s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 11:06
Completed Parallel DNS resolution of 1 host. at 11:06, 0.30s elapsed
Initiating SYN Stealth Scan at 11:06
Scanning my.public.IP.here (my.public.IP.here) [20000 ports]
Discovered open port a/tcp on my.public.IP.here
Increasing send delay for my.public.IP.here from 0 to 5 due to 407 out of 1355 droppe
d probes since last increase.
SYN Stealth Scan Timing: About 11.00% done; ETC: 11:10 (0:04:11 remaining)
SYN Stealth Scan Timing: About 14.78% done; ETC: 11:13 (0:05:52 remaining)
SYN Stealth Scan Timing: About 24.09% done; ETC: 11:12 (0:04:47 remaining)
SYN Stealth Scan Timing: About 33.61% done; ETC: 11:12 (0:03:59 remaining)
SYN Stealth Scan Timing: About 43.15% done; ETC: 11:12 (0:03:19 remaining)
SYN Stealth Scan Timing: About 52.69% done; ETC: 11:11 (0:02:43 remaining)
SYN Stealth Scan Timing: About 62.21% done; ETC: 11:11 (0:02:08 remaining)
SYN Stealth Scan Timing: About 71.75% done; ETC: 11:11 (0:01:35 remaining)
SYN Stealth Scan Timing: About 81.29% done; ETC: 11:11 (0:01:02 remaining)
SYN Stealth Scan Timing: About 90.82% done; ETC: 11:11 (0:00:30 remaining)
Discovered open port b/tcp on my.public.IP.here
Completed SYN Stealth Scan at 11:11, 337.58s elapsed (20000 total ports)
Host my.public.IP.here (my.public.IP.here) is up (0.033s late
ncy).
Scanned at 2009-06-09 11:06:12 Rom, normaltid for 338s
Interesting ports on my.public.IP.here (my.public.IP.here):
Not shown: 19998 closed ports
PORT      STATE SERVICE
a/tcp    open  unknown
b/tcp open  unknown

Read data files from: \Nmap
Nmap done: 1 IP address (1 host up) scanned in 341.41 seconds
           Raw packets sent: 21532 (947.388KB) | Rcvd: 20012 (800.520KB)

It should be noted that the two scans are made from different sides of a firewall (the pc being scanned). The windows 
one is from the outside and the linux is from the inside.

I'd be happy to supply more information if you need it :)

Best regards
Mads Johansen

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