How do I install nmap command under Debian or Ubuntu Linux based system for testing security of my own network?
Nmap is a command line tool for network exploration or security auditing.
It
supports ping scanning (determine which hosts are up), many port
scanning techniques (determine what services the hosts are offering),
and TCP/IP fingerprinting (remote host operating system identification).
Sample outputs:
OR
Sample outputs:
WARNING! nmap scan could get you into legal trouble if you don't have permission to scan the target systems.
To scan an IP address, enter:
Sample outputs:
To scan an entire subnet:
More examples:
Nmap is a command line tool for network exploration or security auditing.
Installation
To install nmap for Debian and Ubuntu Linux based server systems type the following apt-get command:$ sudo apt-get install nmapSample outputs:
Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: nmap 0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded. Need to get 1,643 kB of archives. After this operation, 6,913 kB of additional disk space will be used. Get:1 http://mirrors.service.networklayer.com/ubuntu/ precise/main nmap
amd64 5.21-1.1ubuntu1 [1,643 kB] Fetched 1,643 kB in 0s (16.4 MB/s) Selecting previously unselected package nmap. (Reading database ... 56834 files and directories currently installed.) Unpacking nmap (from .../nmap_5.21-1.1ubuntu1_amd64.deb) ... Processing triggers for man-db ... Setting up nmap (5.21-1.1ubuntu1) ...
Examples
To find the nmap version, enter:# nmap -VOR
# nmap --versionSample outputs:
Nmap version 5.21 ( http://nmap.org )
WARNING! nmap scan could get you into legal trouble if you don't have permission to scan the target systems.# nmap 192.168.1.2Sample outputs:
Starting Nmap 5.00 ( http://nmap.org ) at 2012-11-18 14:41 IST Interesting ports on 192.168.1.2: Not shown: 997 closed ports PORT STATE SERVICE 23/tcp open telnet 53/tcp open domain 80/tcp open http MAC Address: 74:44:01:40:57:FB (Unknown) Nmap done: 1 IP address (1 host up) scanned in 1.28 secondsTo scan a range of IP addresses, enter:
# nmap 192.168.1.2-10To scan an entire subnet:
# nmap 192.168.1.0/24More examples:
## Ping only scan ## nmap -sP 192.168.1.2 ## Scan and do traceroute ## nmap --traceroute IP-ADDRESS nmap --traceroute DOMAIN-NAME-HERE ## TCP SYN Scan ## nmap -sS 192.168.1.2 ## UDP Scan ## nmap -sU 192.168.1.2 ## IP protocol scan ## nmap -sO 192.168.1.2 ## Scan port 80, 25, 443 ## nmap -p 80 192.168.1.2 nmap -p http 192.168.1.2 nmap -p 25 192.168.1.2 nmap -p smtp 192.168.1.2 nmap -p 443 192.168.1.2 nmap -p 80,24,443 192.168.1.2 ## Scan port ranges ## nmap -p 512-1024 192.168.1.2 ## Scan for OS i.e. Operating System Detection ## nmap -O 192.168.1.2 nmap -O --osscan-guess 192.168.1.2 ## Scan for application server version ## nmap -sV 192.168.1.2Type the following command to read nmap man page:
# man nmapsumber:http://www.cyberciti.biz/faq/install-nmap-debian-ubuntu-server-desktop-system/ 
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