This is the GNS3 server repository.

Complete install and setup of GNS3 2.2.7 vm & client on Windows 10. First I have installed VMware workstation then GNS3 client finally I have uploaded and in. Download Latest Version (20.0 MB) Get Updates. Get project updates, sponsored content from our select partners, and more. #GNS3 Client, GNS3 VM, VMWare Workstation Pro Download Link: is the. GNS3 is an open source network simulator with which you can experience connections between routers or switches. After installing the GNS3 application, you can start creating your own project by adding the objects you need, adjusting the attributes of the object to suit your needs, the application supports multiple types of routers and switches, such as Cisco CCNA, CCNP, CCIP, CCSP, CCVP. Trusted Windows (PC) download GNS3 2.2.19. Virus-free and 100% clean download. Get GNS3 alternative downloads.

The GNS3 server manages emulators such as Dynamips, VirtualBox or Qemu/KVM.Clients like the GNS3 GUI and the GNS3 Web UI control the server using a HTTP REST API.

Software dependencies

In addition of Python dependencies listed in a section below, other software may be required, recommended or optional.

  • uBridge is required, it interconnects the nodes.
  • Dynamips is required for running IOS routers (using real IOS images) as well as the internal switches and hubs.
  • VPCS is recommended, it is a builtin node simulating a very simple computer to perform connectitivy tests using ping, traceroute etc.
  • Qemu is strongly recommended on Linux, as most node types are based on Qemu, for example Cisco IOSv and Arista vEOS.
  • libvirt is recommended (Linux only), as it's needed for the NAT cloud.
  • Docker is optional (Linux only), some nodes are based on Docker.
  • mtools is recommended to support data transfer to/from QEMU VMs using virtual disks.
  • i386-libraries of libc and libcrypto are optional (Linux only), they are only needed to run IOU based nodes.



master is the next stable release, you can test it in your day to day activities.Bug fixes or small improvements pull requests go here.

2.x (2.3 for example)

Next major release

Never use this branch for production. Pull requests for major new features go here.


GNS3 is perhaps packaged for your distribution:

  • Gentoo:
  • Alpine:

Linux (Debian based)

The following instructions have been tested with Ubuntu and Mint.You must be connected to the Internet in order to install the dependencies.



  • Python 3.6, setuptools and the ones listed here

The following commands will install some of these dependencies:

Finally these commands will install the server as well as the rest of the dependencies:

To run tests use:

Docker container

For development you can run the GNS3 server in a container

Run as daemon (Unix only)

You will find init sample scripts for various systemsinside the init directory.

Usefull options:

  • --daemon: start process as a daemon
  • --log logfile: store output in a logfile
  • --pid pidfile: store the pid of the running process in a file and prevent double execution

All init scripts require the creation of a GNS3 user. You can change it to another user.


For ubuntu < 15.04

You need to copy init/gns3.conf.upstart to /etc/init/gns3.conf


You need to copy init/gns3.service.systemd to /lib/systemd/system/gns3.service



Please use our all-in-one installer to install the stable build.

If you install via source you need to first install:

  • Python (3.3 or above) -
  • Pywin32 -

Then you can call

to install the remaining dependencies.

To run the tests, you also need to call

before actually running the tests with


or with

Mac OS X

GNS3 2.2.8

Please use our DMG package for a simple installation.

If you want to test the current git version or contribute to the project,you can follow these instructions with virtualenwrapper: homebrew:


If you want enable SSL support on GNS3 you can generate a self signed certificate:

This command will put the files in ~/.config/GNS3/ssl

After you can start the server in SSL mode with:

Gns3 2.2.8 Download

Or in your gns3_server.conf by adding in the Server section:

Running tests

Just run:

If you want test coverage:

Security issues

Please contact us using contact form available here:

Ask questionsCannot connect to compute 'GNS3 VM (GNS3-2.2.7)' with request POST /projects

Describe the bugGNS3 starts fine but the GNS VM indicator does not turn green.

GNS3 version and operating system (please complete the following information):Windows 10 Pro Version 1909 (OS Build 18363.778)Running GNS3 version 2.2.7 on Windows (64-bit) with Python 3.6.8 Qt 5.12.1 and PyQt 5.12.Copyright (c) 2006-2020 GNS3 Technologies.

  • Any use of the GNS3 VM or remote server (ESXi, bare metal etc.)VMware┬« Workstation 15 Pro 15.5.2 build-15785246

To ReproduceSteps to reproduce the behavior:Start GNS3. Wait for GNS3 VM to be fully started. Click on GNS3 menu to open an existing project.

Screenshots or videosIf applicable, add screenshots (e.g. of the topology and/or error message) or links to videos to help explain the problem. This will help us a lot to quickly find the bug and fix it.

Additional contextSo far, the only fix is to close GNS3, thus closing VMware Workstation, doing a repair for VMWare Workstation (reset all VMware virtual nics to their default values) and running vmnet-manager.cmd.GNS3 then works fine until I close it, restart my workstation and try to run it again.

Gns3 2.2.8 Download

BTW. a similar if not the same issue has been report on under community/questions.'Cannot connect to compute 'GNS3 VM (GNS3 VM)' with request POST /projects'

Gns3 2.2.8

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