GNS3 Server

GNS3 Server 2.2.61 is an open-source network simulation and emulation server designed for creating, managing, and running virtual network topologies and laboratory environments. It provides a centralized self-hosted platform for network engineers, students, developers, security professionals, teams, and organizations that need to design, test, troubleshoot, and validate network infrastructure using virtual routers, switches, firewalls, hosts, and other network appliances.

The solution supports common network simulation and virtualization workflows including QEMU-based appliances, Docker containers, Dynamips-based Cisco router emulation, VPCS virtual PCs, and uBridge-based network connectivity. GNS3 Server is suitable for network training, certification preparation, infrastructure testing, security research, automation development, troubleshooting, proof-of-concept environments, and production-oriented network lab deployments.

Features of GNS3 Server:

• Open-source network simulation and emulation server for centralized network lab management.
• Supports creation and management of complex virtual network topologies.
• Provides QEMU integration for running virtual network appliances.
• Supports Docker containers for container-based network devices and services.
• Provides Dynamips support for Cisco router emulation.
• Supports VPCS for lightweight virtual PC network nodes.
• Includes uBridge support for connecting and bridging virtual network interfaces.
• Provides a self-hosted server environment that can be accessed remotely through the GNS3 GUI.
• Helps users build isolated environments for network configuration, testing, troubleshooting, and learning.
• Suitable for network engineers, students, developers, security teams, organizations, development environments, testing laboratories, and production-oriented network simulation deployments.

Usage instructions:

Activate virtual environment: 
$ sudo su
$ cd /opt
$ cd gns3-server
$ source /opt/gns3-venv/bin/activate

#Verify GNS3: $ gns3server --version

Disclaimer: GNS3 Server is provided “as is” under its applicable open-source license. Features, performance, dependency requirements, virtualization compatibility, hardware requirements, security configuration, and supported functionality may vary depending on the installed version, deployment environment, system resources, network appliances, and configuration. Users are responsible for securing the GNS3 Server and its API endpoints, configuring authentication and network access controls where required, protecting network laboratory data, maintaining appropriate backups, managing third-party network appliance images and licenses, and complying with applicable licensing and security requirements. QEMU-based appliances may require hardware virtualization support such as KVM for optimal performance. This solution is suitable for self-hosted network simulation, network training, infrastructure testing, security research, troubleshooting, development, testing, and production-oriented laboratory environments.