GNS3 v3.0 new features

GNS3 3.0 is a major update of GNS network emulator with provides the following enhancements.

Major new features of GNS3 v3.0 are :

  • Secured API based on the latest FastAPI and Pydantic versions
  • New RBAC system with resource pools support
  • Image manager to upload and manage images for Dynamips, Qemu and IOU
  • Templates can be automatically created after images are uploaded
  • Zstandard compression for importing/exporting projects
  • ...

Download GNS3 v3.0.6 (Jan 28, 2026)

GNS3 3.0.6 release notes

GNS3 v3.0.6 fixes the following GNS3 GUI and GNS3 server issues of GNS3 v3.0.0 and adds the following features :

  • GNS3 GUI :
    • Fixing tab name in MobaXterm
    • PyQt6 migration
    • Add XDG Config Home support
    • Support for Python 3.14
    • Clicking the "console connect to all nodes" opens all consoles in name order with case-insensitively
  • GNS 3 Server :
    • Sync appliances
    • Fix creating Qemu disk image.
    • Disable checking for available disk space.
    • Set default location of udhcpc in "/etc/network/udhcpc".
    • Support for Python 3.14
    • Fix non-ASCII characters in project names
    • Increase DB engine pool size and max overflow
    • Enable ip cef in IOU L2 and IOU L3 base configs

Download GNS3 v3.0.6 for Windows

GNS3 3.0.6 installer checksums

File: GNS3-3.0.6-all-in-one.exe
SHA256: f9676e4b5ab6bbf7767646986a5b5d2eee66bdf7779547f500a9733936dd1030

File: GNS3.VM.Hyper-V.3.0.6.zip
SHA256: e6e38e277a90f76627bb2b7169789d229efe018d12726bbc7d48b93ca7184e0f

 

Download GNS3 v2.2.57 (Mar 23, 2026)

GNS3 2.2.57 release notes

GNS3 v2.2.57 fixes the following GNS3 GUI and GNS3 server issues of GNS3 v2.2 and adds the following features :

  • GNS3 GUI :
    • Fix errors from controller are not reported
    • Deactivate 'use default IOU values' by default and update RAM/NVRAM values
    • Fix QMenu parents
    • Fix UltraVNC preconfigured command
    • Dark style
    • Fix bug when dragging scene
    • Upgrade pytest and jsonschema dependencies
    • Upgrade sentry-sdk and psutil dependencies
    • Fix mouse manipulation bug
    • Add Multi VNC tab handling in Superputty
    • Fixing tab name in Superputty + Adding Superputty VNC support
    • settings.py: add OpenBSD packet capture command
  • GNS 3 Server :
    • feat(telnet_server): improve error handling and connection management
    • Deactivate 'use default IOU values' by default and update RAM/NVRAM values
    • Make sure the node shows as stopped when the wrap console cannot be stopped
    • tests(controller,port): short_name finishes successfully when port name is None
    • fix(controller,port): handle None port name to prevent TypeError in short_name method
    • fix: busybox static link detection on Alpine/musl
    • Take populated disks into consideration when calculating PCI device ID

Download GNS3 v2.2.57 for Windows