Just your basic port scanner – with multiprocessing capabilities & further nmap enumeration.


Use at your own discretion, this program does not support or promote unethical or illegal behavior in anyway. This is simply a free tool to help users with CTFs or other legal endeavors.


  1. for further enumeration nmap will need to be installed onto your machine

For Linux Users

sudo apt install nmap


  1. Clone this repository.

  2. Run the following commands to install dependencies and user permission.

pip3 install -r requirements.txt

chmod +x jybps.py
  1. Run the binary in the repository

If you want to run it from any directory simply add a symbolic link:

sudo ln -s $(pwd)/jybps.py /usr/local/bin/jybps

Usage & Examples

Basic Syntax:

Interactive Mode Off: (simply add hostname argument)

jybps --hostname {host_name or ip_address} --workers {num} --startport {num} --endport {num}

Interactive Mode On: (simply remove hostname argument) remove hostname argument image

Default starting port is 1 and ending port is 65535 if no arguments are passed

If no hostname is passed then interactive mode will be on and the user must provide a FQDN or IP to scan ports 1-65535

Workers dictate the granularity of the port checking subprocesses. Workers default to CPU count * 2 + 1 (recommended to use 100-200)

Example use to scan all ports (needs a symbolic link to run in any directory)

jybps --workers 200

To scan ports 1:1024 without turning on interactive mode

jybps --hostname www.fakedomainname.com --workers 200 --startport 1 --endport 1024

To scan ports 1:1024 turning on interactive mode

jybps --workers 200 --startport 1 --endport 1024


jybps -h



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