Download GNS3 v3.0 network emulator

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