GNS3

Network Simulator.

Install:

# Ubuntu install:
sudo add-apt-repository ppa:gns3/ppa
sudo apt update                                
sudo apt install gns3-gui gns3-server
# “sudo usermod -aG group user_name” 
ubridge libvirt kvm wireshark docker

# Install Docker:
$ curl -fsSL https://raw.githubusercontent.com/decyphertek-io/bash/main/docker.sh | bash

References:

https://docs.gns3.com/docs/getting-started/installation/linux