Nmap Port Scan

Nmap Help

This port scan will test your IP (and firewall) or a range of IP addresses for services that are listening on TCP ports and are open to public facing IP addresses.

Entering an IP address or range of IP addresses into the form will have those targets scanned by one of our external servers. For this reason you must enter a public IP address that is routable from an external perspective and one that you have permission to scan. The results will be emailed to you once the scan has completed.

It is possible though highly unlikely that port scanning could cause listening services to become unstable.

Enter the target IP in either of the following formats:

  • 192.168.1.5
  • 192.168.1.1-20 *

* To scan a range of IP addresses you must have a valid membership with HackerTarget.com

Sample Nmap Scan from HackerTarget.com

Starting Nmap 5.00 ( http://nmap.org ) at 2009-07-16 23:12 UTC
Interesting ports on lvps87-230-87-158.dedicated.hosteurope.de (87.230.87.158):
Not shown: 997 filtered ports
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 4.2p1 Debian 7ubuntu3.2 (protocol 2.0)
80/tcp open http Apache httpd 2.0.55 ((Ubuntu) mod_python/3.1.4 Python/2.4.3 PHP/5.1.2 mod_ssl/2.0.55 OpenSSL/0.9.8a mod_perl/2.0.2 Perl/v5.8.7)
8443/tcp open ssl/http Apache httpd 2.0.46 ((Red Hat) mod_ssl/2.0.46 OpenSSL/0.9.7a)
Service Info: OS: Linux

Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 64.27 seconds

We have scanned the IP Address: test.acunetix.com

Free Web Mail addresses are restricted to reduce abuse of the system. A valid membership is required to use a Free Email address.

The online Nmap port scan will test your public IP address and firewall / router for open ports and is a fast way to perform an external port test and discover which services are listening on your perimeter.

You must have permission to scan the IP address you nominate. It is possible for port scanning to disrupt network services and trigger Intrusion Detection Systems.

Enter the target IP address and your email address; results are emailed immediately.

Nmap Port Scan

Enter details to begin a port scan of your nominated IP address.







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About Nmap port scanning


A guide from
the creator

Nmap is the worlds leading port scanner, and is famous having appeared in a number of movies including the Matrix. Initially it was a simple but powerful tool that enabled the scanning of networks or individual hosts to determine if there any services running and if any firewall is present. The more recent versions of Nmap have extended capability that includes a built in scripting language that will perform a multitude of additional checks against any services found to be open. This is pushing Nmap into the realms of a fast light weight vulnerability scanner.

When looking at port scan results from Nmap any ports found to be closed are open on the firewall but have no service listening on the server, while those found to be filtered are being dropped by a firewall (either on the host or the network).

Download nmap from insecure.org, it is available in versions for Windows (XP, 2003, 2008) and Linux / FreeBSD. Zenmap is a graphical front end for the gui minded. I encourage you to download from here as it is the latest versions whereas the version in the Ubuntu, Suse, Fedora and other Linux repositories is not necessarily up to date.

Online Port Scanner

The options used in this online port scanner from HackerTarget.com is a “Fast Scan with Service Identification”; nmap -sV -F your.ip.address.com. To port scan a range of IP addresses, you must have a HackerTarget.com membership.