Software :: NMap - OSScan Results May Be Unreliable
Jul 9, 2011
I'm currently doing some experiments with nmap in a Backtrack 5 VM environment. I am currently at a cafeteria and I'm connected to the (open :S) network at the shop with my Windows machine. In the BT VM I'm trying to scanning my Windows machine (with another network adapter) but I'm getting unexpected results:
nmap -A Aggressive -sS -O 10.236.xxx.xxx
Starting Nmap 5.51 ( http://nmap.org ) at 2011-07-09 12:11 CDT
Nmap scan report for Aggressive (67.215.xxx.xxx)
Host is up (0.17s latency).
rDNS record for 67.215.xxx.xxx: hit-nxdomain.opendns.com
Not shown: 999 filtered ports
PORT STATE SERVICE VERSION
80/tcp open http lighttpd 1.4.19
|_http-methods: No Allow or Public header in OPTIONS response (status code 302)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 2.6.X
OS details: Linux 2.6.9, Linux 2.6.9 - 2.6.30
Network Distance: 1 hop
TRACEROUTE (using port 80/tcp)
HOP RTT ADDRESS
1 14.97 ms hit-nxdomain.opendns.com (67.215.xxx.xxx)
10.236.xxx.xxx is my Windows machine but another machine in the network (67.215.xxx.xxx) is currently replying to my nmap scanning.
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Jan 26, 2010
I have been trying to configure an MTA (sendmail) on a new Debian installation to receive system messages and local network mail. I have no need to fetch or relay mail outside my teeny LAN. The logs on the sending machine told me the mails were refused by the receiving (Debian Lenny) system. So I ran some quick nmap scans. From the sending machine, scanning the Debian machine:
PORT STATE SERVICE
22/tcp open ssh
111/tcp open rpcbind
From the Debian machine, running 'nmap localhost':
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
111/tcp open rpcbind
587/tcp open submission
From the Debian machine, running 'nmap debian' (this is a virtual machine named debian) :
PORT STATE SERVICE
22/tcp open ssh
111/tcp open rpcbind
Why the two different results? How do I get the scans to be the same so I can, eventually, configure an MTA?
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Apr 6, 2010
I'm timing how long it takes to run a command foo. I'm looking to append the results from the time command to a file, and discard the results from the foo command. I tried the following, but it didn't do what I want:
$ time ./foo > /dev/null >> output_from_time_command.txt
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Nov 8, 2010
When dragging, or holding the mouse down in general the mouse tends to 'let go'. In some situations the mouse grabs *through* the window. For example, I may be scrolling in okular and suddenly find myself dragging an item in the browser below. The behavior is independent of the application (it may fall through Dolphin onto Okular just as easily). Highlighting text is the worst performing... It usually takes two to three goes to get the right range. Is this a known issue? Known solution?
OS Information
OS: Linux 2.6.34.7-0.5-desktop x86_64
Current user:
System: openSUSE 11.3 (x86_64)
KDE: 4.5.3 (KDE 4.5.3) "release 8"
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Feb 8, 2011
I'm using an HDMI connection, and the sound connection is unreliable at best. When it works, it is working fine, then all of a sudden (maybe because it isn't being actively used for an extended period of time)the sound connection vanishes. When at System --> Preferences --> Sound --> Output I'm not seeing any option for the HDMI connection currently and the sound is not working. All the volumes are unmuted and I cannot use a softphone nor .....,nor do videos that I have watched in the past with sound have any.
Last night when this happened, I rebooted and the sound was working just fine then. In the past, I was able to get the computer to recognize the HDMI connection has sound by momentarily unplugging it, then plugging it back in. Though both last night and today that hasn't worked.When I bought my computer, I had Windows 7 installed on it. The same thing was happening then, though it was always fixed via disconnecting the HDMI connection briefly, so there is the possibility of it being a hard ware issue.
I've also tried turning off the device (a HDTV in this case) and turning it back on, but that only solved it once or twice, and neither last night nor today.This is also a 64 bit computer, should that be relevant. Using Ubuntu 10.10, and the only available update to my system at the moment is Google Chrome, which I will be updating after this post.I will be restarting my computer after that update and posting back here if the sound is working, especially with note of whats listed at the System --> Preferences --> Sound --> Output if there are any additional options (from memory, there was an HDMI choice there).
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Jul 10, 2011
In general, OpenOffice is quite buggy. My latest problem has been printing. I have this .dot file. When I print it to a networked printer, the document never prints. However, these work:Print to PDF. Printing to a file, transferring the file to the destination machine, and printing it works. Transfer the document. If I print the document directly on the destination system using LibreOffice, it works fine. Printing a web page. This works fine. Since I have a workaround, it's not so crucial that this be fixed. I'm just venting .
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Jul 28, 2011
I have a TV connected to my 11.4 laptop all the time, when I boot Grub outputs its options on the TV screen, then lizard appears for a couple of seconds and then it switches to notebook monitor to continue booting. Or not. About half the time both screens, TV and notebook, go black and nothing happens.
So far I just reboot and wait until the switch from tv to monitor is successful, if that happens everything boots and loads fine. It's like unwatched milk - everything is okay until the moment you turn away and the milk boils over. Boot hardly ever fails if I sit and watch it but sometimes I get two fails in a row.
Never seen this behavior with 11.3 on the same notebook with the same hdmi always plugged in.It's a Core i5 with integrated Intel and a separate nVidia graphic card, what other info is needed? Grub? Dmesg output? Maybe there's a boot log file somewhere, too.
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Mar 8, 2011
I am using a Sealink PN 2202 USB serial adapter on a linux box (Ubuntu 10.4) running kernel 2.6.32-28-generic. I have written a perl script to simply log the incoming RS232 data (9600 8N2) and it works fine when I start it from a bash shell:
perl /home/pk/PerlCode/RS232_D4_v11.pl
However, I need the computer to boot and start logging after a POR. If I try to use Startup Manager to execute my script everything seems ok but I randomly loose about 20% of the incoming RS232 data. In Startup Manager I use the command
gnome-terminal --title="D4 RS232 Log" --execute bash -c "perl
/home/pk/PerlCode/RS232_D4_v11.pl"
If I close the automatically-started script and restart it from a bash shell, I again will randomly loose about 20% of the incoming RS232 data. It almost seems like I have screwed up the driver by using the Startup Manager. The only way I can get reliable logging again is to remove the script from Startup Manager, then restart the computer and manually launch the perl script. I was thinking that maybe the order in which the driver was loaded and perl script started might be an issue. So I tried a bash script that sleeps for 15seconds, then starts the perl script. Again, I loose random pieces of incoming data when this is initiated by Startup Manager.
Here is some more info:
lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 004: ID 0c52:2223 Sealevel Systems, Inc.
Bus 002 Device 003: ID 0c52:2213 Sealevel Systems, Inc.
Bus 002 Device 002: ID 03eb:3301 Atmel Corp. at43301 4-Port Hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub .....
sudo cat /proc/tty/driver/usbserial
usbserinfo:1.0 driver:2.0
0: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0c52
product:2213 num_ports:1 port:1 path:usb-0000:00:1d.0-2.1
1: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0c52
product:2223 num_ports:1 port:1 path:usb-0000:00:1d.0-2.2
ls -al /dev/ttyUSB*
crw-rw---- 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1
I am a member of the group dialout.
I though it may have something to do with su vs my ownership of files. If I do a sudo chmod 777 /dev/ttyUSB* then
ls -al /dev/ttyUSB*
crwxrwxrwx 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crwxrwxrwx 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1
However, after rebooting it reverts to
ls -al /dev/ttyUSB*
crw-rw---- 1 root dialout 188, 0 2011-03-08 09:56 /dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 2011-03-08 09:56 /dev/ttyUSB1
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Sep 19, 2010
I just got a wireless card and I've been having connection issues under Linux. The chipset I have is a Ralink 2860 (the card itself is an Asus PCE-N13) and supports 802.11n speeds up to 300 mbps. I am connecting to a DLink DIR-655 router, which also supports 802.11n at 300 mbps. I get full bars when connecting to my router, and my router's connection information shows my computer connected as 802.11n with the signal at around 80%, but the data rate is usually around 5.5 mbps. (I've rarely seen it go up to 18 mbps) I can confirm this woefully slow speed with anything I try to do over the network. Additionally, my wireless connection will sometime be disconnected and network manager will often fail to connect. When it fails to connect, my router lists my comptuer with the correct IP address, so I know it is successfully connecting to the router and the router is accepting the connection, but network manager seems to not recognize this.
I am running Debian Squeeze (testing), but I have a custom kernel, which is 2.6.35 and is using Debian's kernel configuration. I have the newest firmware from Ralink's website, and I also tried the newest drivers, which made no difference. (I have since removed those drivers, since I'd prefer to use the drivers supplied with the kernel if possible, but I can install them again if necessary) I put this card in my main computer and booted under Windows, and it was able to connect with 100% signal (it's right next to the router) and at 300 mbps. I also tried it under Debian on my main computer (with the stock 2.6.33 kernel), but it only connected as 802.11g, and even at 100% signal it was only connected at 36 mbps. For comparison, my laptop with an 802.11g card and running Mac OS X can achieve the full 54 mbps at 84%.
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Feb 10, 2009
I have this HP 5610 all-in-one fax machine and have always had the issue of faxes failing either receiving or sending ever since I began using VOIP at home about 5 years ago. I have played with the setting of the fax machine and turned off error correction and etc and it has improved but mostly still fail. Voice quality if fine and my network has no problems that I can tell. I have read on the internet that this is a common issues with VOIP and fax machines. This issue is also happening at a friends house as well.
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Nov 1, 2010
I can't copy MP3 files to any USB memory stick with nautilus anymore. The MP3 files 'stutter' or jumps to the next song in any music player or the copied folders are just empty. The copies are more 'reliable' when I copy album after album instead of a bulk copy of lets say 10 albums. I tested several sticks and even formatted them.
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Jun 13, 2011
I'm having all sorts of problems with my wireless connections in an HP Pavilion DM1. I'm sure it was working last week. I have two access points, one with WPA, one unsecured. It's not working with either. I can connect to both of them fine with a wifi USB adapter.
I've tried:
Using Wicd instead of networkmanager
Using the proprietary driver
Installing the linux-firmware package from Oneric (version 1.54)
Changing the frequencies the AP runs on
[Code]...
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Jul 21, 2009
on my laptop (dell d620) when I try to connect to wpa networks I get frequent disconnections and very slow speed.
My network card is: 0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02)
Insted when I use connetion whitout wpa encyption I've no problems...
how to configure iwl3945 to get decent performance on wpa networks ?
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May 13, 2011
My F-14 x64 bootup stalls with this message: "K10 temp ... unreliable CPU thermal sensor: monitoring disabled". I'm unable to find an explanation/basis for this message. I can boot from CD#1 and chroot onto the disk - near as I can tell, all the data is there. Might this be the result of a corrupt boot up sequence file and, if so, which one(s)?
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Jan 6, 2010
I am setting up a display system that will not have a keyboard/mouse and automatically boots into gnome and starts up firefox to a display page. The page is optimized to a 720p resolution which I can set when we use a TV for the display, but is not an option if we use a monitor. I am trying to find a way to set the resolution to 720p automatically on boot up. I am always using 16x9 displays with a DVI connection (to HDMI on TVs)
I was able to get one monitor working by creating a script and setting it to load in the Startup Applications as shown:
Code:
#!/bin/bash
scnres="1280 720 60"
modeline=$(cvt -v $scnres | grep Modeline)
modeline=${modeline#Modeline }
[Code]....
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Feb 20, 2011
So I tried to install it using the install/remove software and then run it out of the start menu but nothing happens. Bear with me I am new to linux,
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Sep 9, 2011
I get this from console...
Code:
dmesg | grep thermal[5.927029] k10temp 0000:00:18.3: unreliable CPU thermal sensor; monitoring disabled
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Apr 30, 2011
Code: Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
wlan0 IEEE 802.11bgn ESSID:"DUSTINSEE"
Mode:Managed Frequency:2.427 GHz Access Point: 00:22:2D:A2:D9:48
Bit Rate=150 Mb/s Tx-Power=13 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
Link Quality=62/70 Signal level=-48 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:5 Invalid misc:31 Missed beacon:0
it takes 3-4 refreshes to make a page load, when i apt-get something, my speed is an average of 400 bytes per second. Making it impossible to get anything done. its been like this for a while, i figured it was a bug in 10.10 and ignored it since 11.04 was coming soon. And with windows everything is fine. I'm getting very sick of this. Can somebody please help me? If you need more info, just let me know.
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Jan 22, 2010
If you have been trying to compile & install the new NMAP 5.20 scanning utility as a 64 bit user, you may have run into some issues as I did...The compiler will halt when you attempt to 'make', saying that you need to recompile using -fPIC.The fix: "./configure CXXFLAGS=-fPIC CFLAGS=-fPIC LPFLAGS=-fPIC"then rerun "make".I hope this helps someone, as it took me way longer than it should have to get this going. Enjoy the new versions as it is supposed to have 10,000 updated OS detection signatures and new scripts!
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Dec 21, 2010
Hopefully Ody has found a result in the 5 years since he posted this question, for anyone else looking for an answer
NMAP scan for a range of individual IP's can be done using the '-' for example:
(this is accurate as of 2010, actual results have been altered to match OP's address range)
$nmap -sP 192.168.0.1-14
Starting Nmap 5.00 ( http://nmap.org ) at 2010-12-22 09:55
Interesting ports on 192.168.0.1:
Not shown: 999 closed ports
PORT STATE SERVICE
80/tcp open http
Interesting ports on 192.168.0.2
Not shown: 999 closed ports
PORT STATE SERVICE
80/tcp open http
Interesting ports on 192.168.0.3:
Not shown: 999 closed ports
PORT STATE SERVICE
80/tcp open http
Nmap done: 14 IP addresses (3 hosts up) scanned in 8.08 seconds
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Mar 29, 2011
i have old version for nmap:root@bt:~# nmap --version nmap version 5.35DC1 ( http://nmap.org ) i download new version, but before i install it, is there a way to upgrade the old one on my system? or need to un-install the old version and install the new version? i tried this:
root@bt:~# yum upgrade nmap
Setting up Upgrade Process
Could not find update match for nmap
No Packages marked for Update
root@bt:~#
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Jan 13, 2011
Wondering how to use awk to take nmap's output "Discovered open port 23/tcp on 192.168.0.4" and create a output of "192.168.0.4:23"?
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Apr 27, 2011
i have a problem with iptables when i use nmap to scan ports then ports shown.this is my rules on my firewall.Quote:
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1002:40080]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
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Aug 25, 2015
nmap does not update the scripts when launching Code: Select allnmap --script-updatedb from ANY debian i EVER tried.
I cannot find a workaround, just old bug reports that this is fixed.
Why, is this not ever working on debian. I expected an update-nmap-db command to be Debian conform but there is no such thing.
Running Wheezy with latest updates.
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Sep 28, 2010
Since I no longer have access to a spare machine to actually test this out on, I was hoping some kind soul might know the answer, or be willing to try it out for me. I'm trying to find out if the port scanner nmap can detect two different services which are sharing a single port. For instance, if I'd managed to set up, I dunno, a web server and an ftp server to both run over the same port, would nmap with version detection be able to detect both of them, or just one?
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Oct 16, 2010
I'm not too sure if this is the right topic to post in but if it isn't please move it to the correct topic. I recently opened some ports for my Playstation 3 and the connection test on the PS3 tells me that the ports are open . But when I execute this command
nmap -p 0-60000 192.168.1.5 I get this
Quote:
Starting Nmap 5.21 ( http://nmap.org ) at 2010-10-16 20:54 AUS Eastern Daylight
Time Nmap scan report for PS3 (192.168.1.5)
Host is up (0.00063s latency).
All 60001 scanned ports on PS3 (192.168.1.5) are closed
MAC Address: **:**:**:**:**:** (Sony Computer Entertainment)
Nmap done: 1 IP address (1 host up) scanned in 4.12 seconds
I could be executing the wrong command or something but I have read through the manual and couldn't find anything that helped. I have tried this command on other machines that I have opened ports for and get similar results except for a few Ephemeral ports (80,443 etc.) which also makes me wonder why these aren't listed as open on the PS3?
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Apr 16, 2011
I scanned my home machine (windows vista) with Nmap, after disabling the firewall and all ports came back with the status as unknown (No Open Ports). Why no ports are showing as open?
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Jul 16, 2011
I want to identify all the computers on my LAN that have port 80 open. So I want to scan an IP range (192.168.0-255.0-255) and have Nmap print onto the screen all the IPaddresses it scanned that are accepting connections on port 80. How do I do this?
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May 5, 2011
when I nmap -sV domain I can see my chrooted apache2 banner how can I do not even show the banner even if is chrooted.
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Nov 13, 2010
I tried to ping some of the pcs on the local network but for those with icmp disabled it doesn't work. I've used
Code:
nmap -sP 192.168.2.0/24
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