- Nmap Commands Cheat Sheet
- Nmap Command For Os Detection
- Nmap Commands For Os X 7
- Nmap Commands For Os X 4
One can also perform OS footprinting using Nmap. Based on the type of scan, the result produced by it ensured accuracy. Nmap Commands Below we will see some of the important Nmap commands that will be used to perform the scan in the desired manner. Jul 05, 2019 We can use nmap more aggressively to try to winkle more information out of the device. The -A (aggressive scan) option forces nmap to use operating system detection, version detection, script scanning, and traceroute detection. The -T (timing template) option allows us to specify a value from 0 to 5. This sets one of the timing modes. May 01, 2020 Target Specification Switch Example Description nmap 192.168.1.1 Scan a single IP nmap 192.168.1.1 192.168.2.1 Scan specific IPs nmap 192.168.1.1-254 Scan a range nmap scanme.nmap.org Scan a domain nmap 192.168.1.0/24 Scan using CIDR notation -iL nmap -iL targets.txt Scan targets from a file -iR nmap -iR 100 Scan 100 random hosts -exclude nmap -exclude 192.168.1.1 Exclude. Apr 20, 2020 Sometimes on a network it is beneficial to know the Operating System (OS) of a machine. Accessing a system is easier when you know the OS because you can specifically search the Internet for known security holes in the OS. Granted, security holes are.
Some of this tool’s best features are that it’s open-source, free, multi-platform and receives constant updates each year. It also has a big plus: it’s one of the most complete host and network scanners available. It includes a large set of options to enhance your scanning and mapping tasks, and brings with it an incredible community and comprehensive documentation to help you understand this tool from the very start. Nmap can be used to:
- Create a complete computer network map.
- Find remote IP addresses of any hosts.
- Get the OS system and software details.
- Detect open ports on local and remote systems.
- Audit server security standards.
- Find vulnerabilities on remote and local hosts.
It was mentioned in the Top 20 OSINT Tools article we published, and today we’ll explore a little bit more about this essential security tool with some practical terminal-based Nmap commands.
Best 15 Nmap command examples
Let’s get to know a few useful command-line based scans that can be performed using Nmap.
1. Basic Nmap Scan against IP or host
nmap 1.1.1.1
Now, if you want to scan a hostname, simply replace the IP for the host, as you see below:
nmap cloudflare.com
These kinds of basic scans are perfect for your first steps when starting with Nmap.
2. Scan specific ports or scan entire port ranges on a local or remote server
nmap -p 1-65535 localhost
In this example, we scanned all 65535 ports for our localhost computer.
Nmap is able to scan all possible ports, but you can also scan specific ports, which will report faster results. See below:
nmap -p 80,443 8.8.8.8
![Nmap Nmap](/uploads/1/2/6/6/126603363/158393594.jpg)
3. Scan multiple IP addresses
Let’s try to scan multiple IP addresses. For this you need to use this syntax:
nmap 1.1.1.1 8.8.8.8
You can also scan consecutive IP addresses:
nmap -p 1.1.1.1,2,3,4
This will scan
1.1.1.1
, 1.1.1.2
, 1.1.1.3
and 1.1.1.4
.4. Scan IP ranges
Nmap Commands Cheat Sheet
You can also use Nmap to scan entire CIDR IP ranges, for example:
Nmap Command For Os Detection
nmap -p 8.8.8.0/28
This will scan 14 consecutive IP ranges, from
8.8.8.1
to 8.8.8.14
.An alternative is to simply use this kind of range:
nmap 8.8.8.1-14
You can even use wildcards to scan the entire C class IP range, for example:
nmap 8.8.8.*
This will scan 256 IP addresses from
8.8.8.1
to 8.8.8.256
.If you ever need to exclude certain IPs from the IP range scan, you can use the “–exclude” option, as you see below:
nmap -p 8.8.8.* --exclude 8.8.8.1
5. Scan the most popular ports
Using “–top-ports” parameter along with a specific number lets you scan the top X most common ports for that host, as we can see:
nmap --top-ports 20 192.168.1.106
Replace “20” with the desired number. Output example:
6. Scan hosts and IP addresses reading from a text file
In this case, Nmap is also useful to read files that contain hosts and IPs inside.
Let’s suppose you create a list.txt file that contains these lines inside:
The “-iL” parameter lets you read from that file, and scan all those hosts for you:
nmap -iL list.txt
7. Save your Nmap scan results to a file
On the other hand, in the following example we will not be reading from a file, but exporting/saving our results into a text file:
nmap -oN output.txt securitytrails.com
Nmap has the ability to export files into XML format as well, see the next example:
nmap -oX output.xml securitytrails.com
8. Disabling DNS name resolution
If you need to speed up your scans a little bit, you can always choose to disable reverse DNS resolution for all your scans. Just add the “-n” parameter.
See the difference with a normal DNS-resolution enabled scan:
9. Scan + OS and service detection with fast execution
Using the “-A” parameter enables you to perform OS and service detection, and at the same time we are combining this with “-T4” for faster execution. See the example below:
nmap -A -T4 cloudflare.com
This is the output we got for this test:
10. Detect service/daemon versions
This can be done by using -sV parameters
nmap -sV localhost
As you can see here:
11. Scan using TCP or UDP protocols
One of the things we love most about Nmap is the fact that it works for both TCP and UDP protocols. And while most services run on TCP, you can also get a great advantage by scanning UDP-based services. Let’s see some examples.
Standard TCP scanning output:
UDP scanning results using “-sU” parameter:
12. CVE detection using Nmap
One of Nmap’s greatest features that not all the network and systems administrators know about is something called “Nmap Scripting Engine” (known as NSE). This scripting engine allows users to use a pre-defined set of scripts, or write their own using Lua programming language.
Using NSE is crucial in order to automate system and vulnerability scans. For example, if you want to run a full vulnerability test against your target, you can use these parameters:
nmap -Pn --script vuln 192.168.1.105
Output example:
As you can see, in this vulnerability test we were able to detect one CVE (Slowloris DOS attack).
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13. Launching DOS with Nmap
Nmap features never seem to end, and thanks to the NSE, that even allows us to launch DOS attacks against our network testings.
In our previous example (#12) we found the host was vulnerable to Slowloris attack, and now we’ll try to exploit that vulnerability by launching a DOS attack in a forever loop:
14. Launching brute force attacks
NSE is really fascinating – it contains scripts for everything you can imagine. See the next three examples of BFA against WordPress, MSSQL, and FTP server:
WordPress brute force attack:
Brute force attack against MS-SQL:
FTP brute force attack:
nmap --script ftp-brute -p 21 192.168.1.105
15. Detecting malware infections on remote hosts
Nmap is able to detect malware and backdoors by running extensive tests on a few popular OS services like on Identd, Proftpd, Vsftpd, IRC, SMB, and SMTP. It also has a module to check for popular malware signs inside remote servers and integrates Google’s Safe Browsing and VirusTotal databases as well.
A common malware scan can be performed by using:
nmap -sV --script=http-malware-host 192.168.1.105
Or using Google’s Malware check:
nmap -p80 --script http-google-malware infectedsite.com
Output example:
Nmap is one of the most complete and accurate port scanners used by infosec professionals today. With it, you can perform simple port scan tasks or use its powerful scripting engine to launch DOS attacks, detect malware or brute force testings on remote and local servers.
Today we covered the top fifteen Nmap commands to scan remote hosts, but there’s a lot more to discover if you’re starting to use Nmap in your OSINT strategy.
If you also need to map domains, IPs and discover DNS zones, try our SecurityTrails toolkit, or grab a free API account today.
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Esteban Borges is a security researcher and technical writer specialized in Linux security. He has been working in the cybersecurity industry for more than 15 years, with a focus on technical server security and open source intelligence.
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Released:
Python3-nmap converts Nmap commands into python3 methods making it very easy to use nmap in any of your python pentesting projects
Project description
A python 3 library which helps in using nmap port scanner. The way this tools works is by defining each nmap command into a python function making it very easy to use sophisticated nmap commands in other python scripts. Nmap is a complicated piece of software used for reconnaissance on target networks, over the years new features have been added making it more sophisticated.
With this python3-nmap we make using nmap in python very easy and painless
For example in nmap if you want to scan for common ports you would to something like this
But in this python3-nmap script you would do something like this
You will notice each nmap command is defined as a python function/method. this make it easy to remember this in python and easily use them.
Again in nmap if you want to use the famous dns-brute script you would do something like this
But in this python3 script again it's very easy you just do something like this
How to use python3-nmap
Using this scripts is very easy, though it assumes you have nmap already installed, as it is the primary dependence required. Also this tools supports both windows and linux, it's cross platform so to say.
Installation
In nmap some commands require root privileges for example the command to identify OS requires root privileges;
The same applies to the script to be able to run the os identifier you have to be a super user.
How to use the script to identify OS
Class components of python3-nmap
The script is made of up the following classes, each holding different nmap abilities and scan types.
- Nmap
- NmapHostDiscovery
- NmapScanTechniques
Identifying service version
In nmap if you want to identify versions you would run this kind of command
In this python script you would do something like this
Nmap commands available
The following nmaps commands have been added to the following scripts
- get Nmap version details
- Nmap top port scan
- Nmap Dns-brute-script( to get subdomains )
- Nmap list scan
- Nmap Os detection
- Nmap subnet scan
- Nmap version detection
Nmap Scanning Techniques
The script offers nmap scan techniques also as python function/methods
- nmap_fin_scan
- nmap_idle_scan
- nmap_ping_scan
- nmap_syn_scan
- nmap_tcp_scan
- nmap_udp_scan
Supporting the nmap host discovery
The script also offers support for map Added Nmap Host discovery techniques still as python function/methods
- Only port scan (-Pn)
- Only host discover (-sn)
- Arp discovery on a local network (-PR)
- Disable DNS resolution (-n)
NmapHostDiscovery
def nmap_portscan_only(self, host, args=None)
def nmap_no_portscan(self, host, args=None):
def nmap_arp_discovery(self, host, args=None):
def nmap_disable_dns(self, host, args=None):
Nmap is a large tool, as you can see python3-nmap provides only things what you could say commonly used nmap features.
Using custom nmap command line arguments.
As we said, the script defines each set of nmap command as python function/methods. You can also pass arguments to those methods/function thus extending your capabilities for example.Let's say we want to scan top ports but also perform version detection .
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Nmap Commands For Os X 7
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Nmap Commands For Os X 4
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