Nmap (Network Mapper) is a security scanner originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich) used to discover hosts and services on a computer network, thus creating a "map" of the network.

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Nmap reporting incorrect results from an idle scan

I have a VPS that I was scanning to make sure everything is in check. A regular SYN scan reports that ports 25 and 80 are open (which they should be). When I run an idle scan however, I get back that ...
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Is Telnet Port Open For The Range IP?

I want to port scanning on telnet port in a range ip . for ex: i want to know is the 23 port open on 127.0.0.1/255 ? what am i going to do ? is there a option for Nmap to do this ? Thanks .
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Why does nmap report different results from localhost?

When I execute "nmap -sT -O localhost" per the Centos 5 deployment guide, I get: Not shown: 1677 closed ports PORT STATE SERVICE 22/tcp open ssh 80/tcp open http 8080/tcp open http-proxy ...
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nmap port scan for vpn and proxies

I am trying to detect the vpn and proxies from the iplist so is anyone know the fastest and reliable scan command for nmap? right now I am using this nmap -sS -sU -T4 -A -v -PE -PP ...
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iptables rule to drop SYN and FIN attacks

From a Trustwave report, we are trying to set our server to block this type of request but after trying several combinations of rules, we can still see the ports. Could anyone give me a hint or the ...
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Can't get nmap to work under Windows 7 64 bit

I'm trying to install and run the nmap tool to test my server, but it keeps saying Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 and showing all the server ports ...
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367 views

Does nmap work with ipv6?

Does nmap work with ipv6? I don't even really know if ports are handled in the same way on ipv6 so I just wondered.
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use of nmap clogged my network

I was using nmap to scan the mac addresses of my network.What I found was internet connections and rest of network services badly clogged the users were not able to connect to internet.After messing ...
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how do I scan all computers in my network with nmap?

I am trying to use nmap to scan the computers on my network for conficker. I am using Windows. What do I put in the target for all computer on a given subnet? It is running: nmap -T4 -A -v I put ...
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284 views

Command or utility to measure the amount of traffic generated by an nmap scan

First, just a bit of background: My ISP has decided to block all inbound connections (from their customers' perspective) which effectively means that I can no longer host anything on my connection ...
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different nmap results

Hello I have a scan on my server form outside and from inside, why results are different? [root@xxx ~]# nmap -sV -p 0-65535 localhost Starting Nmap 5.51 ( http://nmap.org ) at 2011-02-16 07:59 MSK ...
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NMap - running as root yields different response than running as another user

nmap -eeth1 [hostname] -p80 Running that command as root uses interface one and fails as expected (interface one is on a subnet blocked by the host.) Using interface 0 succeeds as it should. ...
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nmap reports host up when it isn't

On an Ubuntu VMWare VM I ran: sudo nmap -sP 192.168.0.* This returned: Starting Nmap 5.00 ( http://nmap.org ) at 2010-12-28 22:46 PST Host 192.168.0.0 is up (0.00064s latency). Host 192.168.0.1 ...
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Network audit tracker

I'm looking for a tool like PBNJ (http://pbnj.sourceforge.net/) but not quite. The functionality I'm looking for is something I can throw into cron to run daily or weekly, scan a network(s), store the ...
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785 views

iptables & nmap on ubuntu

The following are my iptable rules on a ubuntu cloud server: cat /etc/iptables.rules: *filter :INPUT DROP [598:41912] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [456:35354] -A INPUT -i lo -j ...
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How to scan for which ports would be open to another location

I'm just assessing the security of my home server in preparation for opening it up to the internet. I've used nmap from a machine on my local network but I have firewall rules allowing access from the ...
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330 views

Help! Whats up with my network?

I've just done a simple nmap scan of my network with nmap: nmap -sP 192.168.1.1-255 networkserver@networkServer:~$ sudo nmap -sP 192.168.1.1-255 Starting Nmap 5.00 ( http://nmap.org ) at 2010-08-26 ...
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How to use nmap to ping domains and get the output as domains and not IPs?

I am trying to use nmap to ping a list of domains, i am using: nmap -sP -iL /path/to/file/domains The ping works fine but in the output for domains that ping was successful I get the domains ip ...
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267 views

Why can NMAP not show some ports?

when I do "nmap localhost", some open ports are listed and others aren't. For Example SSH on 22 is listed, but SSH on 10022 is not. Host's port 10022 in my case is NAT port forwarding to a ...
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nmap find all alive hostnames and IPs in LAN

How can I issue a nmap command that shows me all the alive machines' IP addresses and corresponding hostname s in the LAN that I am connected? (if this can be done in another way/tool you surely are ...
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Why do nmap -p <port> and nmap -A scans show different results?

I have a C# application that I've written that listens on port 789. It is running on a Windows XP Professional computer. Running netstat -an | find "789" TCP 0.0.0.0:789 0.0.0.0:0 ...
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Can I use nmap to discover IPs and mac addresses?

When I need to locate the IPs of devices by their mac address on a Windows system, I normally use Advanced IP Scanner (from radmin.com) to scan the network, then I use arp -a to list the mac ...
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How to Hide OS Fingerprint of Virtual Machine?

Is it possible to make a linux virtual machine appear as the host machine to a network tool like nmap or Blue's Port Scanner without recompiling the kernel?
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how to check open ports of bunch of website at once with nmap/linux?

I want to use nmap in such a way that I could check bunch of server's port at once for checking whether their particular port is open or not? right now I have 10 ip addresses but in future this could ...
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921 views

Is it dangerous to allow every user to run nmap as root?

At our university we have some computers in the "networking lab", that are configured to allow everybody to run nmap as root via /etc/sudoers. Could this be a security vulnerability?
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Is there a Nagios plugin that uses Nmap and does port checking?

I need to monitor open and closed ports on dozens of hosts. I've found a Nagios plugin that does what I need, but I would have to use this script through NRPE. Some of the hosts are powered by Linux ...
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NMAP: Check if port 80 and 8080 is open

In our company, I want to check if users are running web servers on port 80 and 8080. I downloaded nmap and ran this command: nmap -p 80,8080 192.168.1.0-255 I got a list of IPs and tried to ...
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tcp port 554 open

I was running a routine security check of the machines I manage today and found in my nmap scans that TCP/554 is open, although when I run 'netstat -an' on the machine itself it doesn't show up, same ...
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Network Scan, Filtering for Top Level Domain

Greetings, I have a list of 2 /24s worth of IP addresses in seperate text files. What I am interested in doing is finding a way to resolve the hosts of these IP addresses and filter out to display ...