Introduction to Nmap

This video is an introduction to Nmap.

Intro 0:00
Installation 0:31
Reverse DNS Lookup 0:59
Ping Sweep 1:50
Exclude an Address 2:34
Scanning from a List 3:24
Saving Output 3:59
Basic Port Scan 5:52
Service Scan 6:44
UDP Scan 7:34
Verbosity and Scan Speed 8:09
NSE – Default Scripts 9:24
NSE – http-Malware-host 11:09
Outro 11:58

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1) Install nmap
$ sudo apt update && sudo apt install nmap

2) Check version
$ nmap –version

3) scan every IP in network block and do a reverse DNS lookup
$ nmap -sL 192.168.1.0/24

4) Ping sweep a network
$ nmap -sn –open 192.168.1.0/24

5) Exclude an IP address
$ nmap -p 192.168.1.0/24 –exclude 192.168.1.1

6) Save output
$ nmap -oA output scanme.nmap.org

7) Scan from a list
$ nmap -iL iplist.txt

8) Adjust scan speed (-T3 is default)
$ nmap -T4 scanme.nmap.org

9) Detect services that are running
$ nmap -sV scanme.nmap.org

10) Scan TCP and UDP ports
$ nmap -sT -sU scanme.nmap.org

11) Scan with defautl ‘safe’ scripts
$ nmap -sV -sC scanme.nmap.org

12) A common malware scan can be performed by using
$ nmap -sV –script=http-malware-host 192.168.1.105

Scritps are located at /usr/share/nmap/scripts/

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simple network management protocol