HelloWorld IT

How to do a network scan?

February 28, 2021

What is a ping sweep?

A ping sweep (also known as an ICMP sweep) is a basic network scanning technique used to determine which of a range of IP addresses map to live hosts (computers). Whereas a single ping will tell you whether one specified host computer exists on the network.

How does ping sweep work?

A ping sweep consists of ICMP (Internet Control Message Protocol) ECHO requests sent to multiple hosts. If a given address is live, it will return an ICMP ECHO reply.

Scripting

Here, you can found a bash script that runs a for loop for the hosts that found reachable, and on those hosts runs against another for loop and scans the hosts using the Nmap command.

Github

Requirements

If you want run the script over local, you must have the package nmap already installed. If you wan’t install it, you may be should use the Dockerfile. So the entire requeriments should be:

1. Bash Shell or another
2. Docker
3. Git
4. Nmap

Run script locally

git clone https://github.com/danielitogomez/bash.git
cd $PWD/bash/netadmin-tools/NetworkScan
./network-scan-local.sh

locally

Using Docker Alpine image

git clone https://github.com/danielitogomez/bash.git
cd $PWD/bash/netadmin-tools/NetworkScan
docker build .

docker