What is Nmap? Why you need this network mapper | Network Security Scanner

(Nmap Network Vulnerability Scanning Tool)When a new vulnerability is discovered, you often want to scan your networks quickly to identify vulnerable systems before the bad guys do. While Nmap isn’t a comprehensive vulnerability scanner, NSE is powerful enough to handle even demanding vulnerability checks. Many vulnerability detection scripts are already available, and they plan to distribute more as they are written.

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Obviously there are a few ways to check for this, the first is obvious, check what servers have IIS installed. However, this bug isn’t limited to IIS, rather anything using HTTP.sys and, of course, a HTTP server can be spun up on any port you want so we need to check for servers that have HTTP exposed on any port from 1-65535.


Early in the article you say, “ anything using HTTP.sys and, of course, a HTTP server can be spun up on any port you want so we need to check for servers that have HTTP exposed on any port from 1-65535.

GFI LanGuard is a network security and vulnerability scanner designed to help with patch management, network and software audits, and vulnerability assessments. The price is based on the number of IP addresses you wish to scan. A free trial version (up to 5 IP addresses) is available. Read 6 reviews.

Reconnaissance is to collect as much as information about a target network as possible. From a hacker’s perspective, the information gathered is very helpful to make an attack, so to block that type of malicious attempt, generally a penetration tester tries to find the information and to patch the vulnerabilities, if found. This is also called Footprinting. Usually by information gathering, someone can find the below information:

Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and official binary packages are available for Linux, Windows, and Mac OS X.

As you can see below, I have used (-sc) options (or –script), which is a default script scan for the target network. You can see we got ssh, rpcbind, netbios-sn but the ports are either filtered or closed, so we can say that may be there are some firewall which is blocking our request. Later we will discuss how to identify firewalls and try to evade them.

The -Sp option is responsible for a ping only scan. It will be more useful when you have a group of IP addresses and you don’t know which one is reachable. By specifying a particular target, you can get even more information, like MAC address.

Once logged into Enlightenment, a terminal window will need to be opened. By clicking on the desktop background, a menu will appear. Navigating to a terminal can be done as follows: Applications -> System -> ‘Xterm‘ or ‘UXterm‘ or ‘Root Terminal‘.

Rapid7 Nexpose is a vulnerability scanner which aims to support the entire vulnerability management lifecycle, including discovery, detection, verification, risk classification, impact analysis, reporting and mitigation. It integrates with Rapid7’s Metasploit for vulnerability exploitation. It is sold as standalone software, an appliance, virtual machine, or as a managed service or private cloud deployment. User interaction is through a web browser. There is a free but limited community edition as well as commercial versions which start at $2,000 per user per year. Read 12 reviews.(Nmap Network Vulnerability Scanning) Tool

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