Port Scanner + Banner Grabber

A simple multi-threaded port scanner written in C with basic banner grabbing support.

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Features

• Multi-threaded TCP port scanning
• Basic banner grabbing
• HTTP response detection
• Common service identification
• Custom port range support

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Project Structure

.
├── port_scanner.c
└── README.md

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Setup

Compile C code using:

gcc -o port_scanner port_scanner.c -lpthread
./port_scanner -i 192.168.1.1 -s 1 -e 1024

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Usage

./port_scanner -i 127.0.0.1 -s 1 -e 100

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Arguments

Argument	Description
-i	Target IP or hostname
-s	Start port
-e	End port

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Example Output

[+] Port 22 OPEN | Service: ssh
[+] Port 80 OPEN | Service: http

======================================================================
OPEN PORTS AND BANNERS
======================================================================

Port    : 22
Service : ssh
Banner  : SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.5

Port    : 80
Service : http
Banner  : HTTP/1.1 200 OK

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Notes

• Make sure the script has execute permission:

chmod +x port_scanner

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