N-map: the Network Mapper – Free Security Scanner

N-map: the Network Mapper – Free Security Scanner

N-map means the network map. It allows the secured process of a network on the Internet. This tool helps you to secure the whole network through N-map security tool. Thus, you can get safe access internet.

You can see this blog about “What is ‘nmap’ and why is it used?“. It will help you to fully understand about that.

The purpose of N-map is for secured connection on the Internet for Hosts, Subnet, and DNS(Domain Name Server).

N-map tool is much helpful to the Business Owner as well as Entrepreneur. Because There’s needed a secure connection to selling out the product. So, N-Map is essential for them.

I will provide some important command about N-map. By the way, you can learn as you want.

Nmap Command In Linux

You can see here the list of nmap command.

Nmap Host Scan

Explained Code:~ $nmap 192.168.0.101(IP address of Intenet) 192.168.0.102 192.168.0.103

[email protected]:~$ nmap 192.168.0.101 192.168.0.102 192.168.0.103

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 11:17 IST
Nmap scan report for 192.168.0.101
Host is up (0.00054s latency)
Not shown: 997 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
6346/tcp closed gnutella

Nmap scan report for 192.168.0.102
Host is up (0.00051s latency)
Not shown: 997 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
6346/tcp closed gnutella

Nmap scan report for 192.168.0.103
Host is up (0.00052s latency)
Not shown: 997 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
6346/tcp closed gnutella

Nmap done: 3 IP addresses ( 3 hosts up ) scanned in 8.45 seconds

-This code scanning multiple hosts in internet connection.

Nmap Scan Subnet

Explained Code:~ $ nmap 10.10.2.*(subnet address of internet )

[email protected]:~$ nmap 10.10.2.*

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 10:47 IST
Nmap scan report for 10.10.2.10
Host is up (0.00048s latency) .
All 1000 scanned ports on 10.10.2.10 are Closed

Nmap scan report for 10.10.2.11
Host is up (0.00029s latency) .
All 1000 scanned ports on 10.10.2.11 are Closed

Nmap scan report for 10.10.2.12
Host is up (0.00035s latency) .
All 1000 scanned ports on 10.10.2.12 are Closed

Nmap scan report for 10.10.2.16
Host is up (0.00027s latency) .
All 1000 scanned ports on 10.10.2.16 are Closed

Nmap scan report for 10.10.2.23
Host is up (0.00038s latency) .
All 1000 scanned ports on 10.10.2.23 are Closed

Nmap scan report for 10.10.2.34
Host is up (0.00037s latency) .
All 1000 scanned ports on 10.10.2.34 are Closed

-This command scanning subnet address from the internet.

Nmap Port Scan

Explained Code: $ nmap -PA -p 22,80 ( port number of the process from one host to other hosts )

[email protected]:~$ nmap -PA -p 22,80 192.168.0.101

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 11:16 IST
Nmap scan report for 192.168.0.101
Host is up (0.00033s latency ) .
PORT STATE SERVICE
22/tcp filtered ssh
80/tcp open http

Nmap Done: 1 IP address scanned in 1.22 seconds

-This command scan port address with TCP.

The Port is a process to acknowledge at a particular place for example when we upload any file or photo on the internet. The Port number identified to a place of the process where to placed.

Nmap Check If Host Is Up

Explained Code: $ nmap -PN 192.168.0.101

[email protected]:~$ nmap -PN 192.168.0.101

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 11:10 IST
Nmap scan report for 192.168.0.101
Host is up (0.00046s latency ) .
Not shown: 997 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
6346/tcp closed gnutella

Nmap done: 1 IP address scanned in 6.35 seconds

-This command checked the connection is secured or not.

Nmap Router And Host Interface

[email protected]:~$ nmap –iflist

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 11:14 IST
*********************INTERFACES**************************************
DEV (SHORT) IP/MASK TYPE UP MTU MAC
lo (lo) 127.0.0.1/8 lookback up 65536
lo (lo) ::1/128 lookback up 65536
ens33 (ens33) 10.10.2.11/16 ethernet up 1500 00:01:6C:59:C9:E2
ens33 (ens33) fe80::d704:e408:62b9:63d2/64 ethernet up 1500 00:01:6C:59:C9:E2

***********************ROUTES*******************************************
DST/MASK DEV METRIC GATEWAY
10.10.0.0/16 ens33 100
169.254.0.0/16 ens33 1000
0.0.0.0/0 ens33 100 10.10.1.200
::1/128 lo 0
fe80::d704:e408:62b9:63d2/128 lo 0
fe80::/64 ens33 256
ff00::/8 ens33 256

-This command displays the interface of hosts and router on the internet.

Nmap List All Devices On Network

[email protected]:~$ nmap -sP 192.168.0.*

Starting Nmap 7.01 ( https://nmap.org ) at 2016-08-20 11:11 IST
Nmap scan report for 192.168.0.0
Host is up (0.00012s latency) .
Nmap scan report for 192.168.0.1
Host is up (0.00026s latency) .
Nmap scan report for 192.168.0.2
Host is up (0.00022s latency) .
Nmap scan report for 192.168.0.3
Host is up (0.00021s latency) .
Nmap scan report for 192.168.0.4
Host is up (0.00019s latency) .
Nmap scan report for 192.168.0.5
Host is up (0.00018s latency) .
Nmap scan report for 192.168.0.6
Host is up (0.00036s latency) .
Nmap scan report for 192.168.0.7
Host is up (0.00043s latency) .
Nmap scan report for 192.168.0.8
Host is up (0.00042s latency) .
Nmap scan report for 192.168.0.9
Host is up (0.0012s latency) .
Nmap scan report for 192.168.0.10
Host is up (0.0012s latency) .
Nmap scan report for 192.168.0.11
Host is up (0.00039s latency) .
Nmap scan report for 192.168.0.12
Host is up (0.00042s latency) .
Nmap scan report for 192.168.0.13
Host is up (0.00033s latency) .

-This command scanned all the live hosts or devices on the internet. It displays the all live hosts.

Conclusion

Security is much important on the internet. Because some time network may have lost.

By Network crashed, The Data of own may be hacked or theft data. So It’s important to be secured in a particular place.

N-map is the best security tool to safe network on the internet and protecting data against hack. So, we can access the internet as safely. you can see more about security.

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