mini_nmap_project_for_port_scan

a bigginer friendly port scanner project that will be updated frequently utill it is like a "mini nmap"

stage 1

-scans the small range (1-100) of TCP ports

---detects which ports are open and which are closed

---biggener-friendly

requirements for stage 1

python 3 and socket library

stage 2

-I have added the stage 2 port scanner with following updates

----It uses exception handling about

1-timeout...2-invalid host name...3-socket error...4-stop scanning

----I have also used threading for the conveniance of time,as if we scan a 100 ports all should be processed

parallel as the timeout is 0.5 ... if e dont use it it would take 50 secs to scan that is a bit long...

how threading works

Normally, a port scanner checks ports one by one.

It tries port 1, waits for a response.

Then port 2, waits again.

This makes scanning slow, because each check takes time.

With threading, multiple ports are scanned at the same time.

Each thread runs the scan() function on a different port.

While one thread is waiting for a response, others are still working.

This makes the scan much faster

requirements for stage 2

python3,socket library and threading library.

Stage 3

i have added stage in the project and it is ascanner to scan UDP ports only

it only scans udp ports and give you simple information that which port is open and which is not

its not that advance from stage 2 but in this stage we understand that how to scan a udp port only

it gives us a simple understanding that how the scan of udp is different from TCP

difference between TCP and UDP scan

TCP === TCP is connection-oriented.

A TCP scan usually tries to establish a connection with the target port using the three-way handshake (SYN → SYN/ACK → ACK).

If the port responds with SYN/ACK, it’s open.

If it responds with RST, it’s closed.

If there’s no response, it might be filtered (firewall blocking).

UDP=== UDP is connectionless (no handshake).

A UDP scan just sends a UDP packet to a port.

If it gets a response (like a proper application reply), the port is open.

If it gets an ICMP “Port Unreachable” message, the port is closed.

If there’s no response, it might be open, or filtered (uncertain).

requirements

python3, socket library

Stage 4

in this stage i have just added TCP and UDP scanning together ... with options to scan weather it is TCP ,UCP or b

both

i have used ThreadpoolExecutor to increase the speed and eficiency ... instead of scanning every port

seperatly it scans simultaneously.

Requirements

python3, socket and time library and ThreadPoolExecutor for efficiency

contribution

this is only for educational purpose but feel free to suggest any changes via issues and pull requests