Question

what is Nmap?

How to use Nmap ?

. what the most famous nmap orders?

Answer 1

what is Nmap?

Nmap can be defined as that it is a tool by which we can diagnose or we can detect the services that are currently running on a system which is connected to the internet, in most cases it is used by network admins to identify potential security flaws in their own network system. it can also be used to automate many parallel task like monitoring service update schedule,

for better understanding of Nmap lets learn how does it scan or diagnose the Network system. Nmap sends raw IP packets in an extraordinary manner to recognizes the hosts which are available on the network system. It can likewise identify the services which are being offered by these hosts, their working framework and a lot of other characteristics.

How to use Nmap ?

The use of Nmap relies upon the target machine in light of the fact there is a difference between simple (basic) scanning and advance scanning. We have to utilize advanced techniques to bypass the firewall and intrusion detection software to get the correct outcome.

what the most famous nmap orders?

The following are the example of some essential commands  and their usage.

1.If you only want to scan a single system, then the command will be

nmap target

# nmap target.com

# nmap 192.168.1.1

2. If you want to scan the entire subnet, then the command will be

nmap target/cdir

# nmap 192.168.1.1/24

3. It is bit easy to scan a multiple targets, you just need to do is to separate each target by space:

nmap target target1 target2

# nmap 192.168.1.1 192.168.1.8

4. if you want to scan a range of IP addresses, but not the entire subnet. In this case all you need to use this command:

nmap target-100

# nmap 192.168.1.1-100

5.if you have a list of a target machines. You can make Nmap scan for the entire list by using:

# nmap -iL target.txt         Make sure to put the file on the same directory

6. sometimes we need to scan the entire subnet but not a specific IP addresses because it might be dangerous for us. In such case, use the Nmap command with the excluding parameter:

# nmap 192.168.1.1/24 – -exclude 192.168.1.1