SOFTWARE LICENSE GUIDE
GNS3
GNS3 is a free and open-source network software emulator for designing and testing network topologies.
What it does
It allows users to simulate complex network environments using virtual devices and real operating systems, aiding in network design, testing, and certification preparation.
Who it may suit
Network engineers, students, and IT professionals who need to design, build, and test virtual networks without physical hardware.
Free tier and license
Not applicable; it is completely free and open source.
Limitations to check
While GNS3 itself is free, running commercial router images or other vendor-specific software within it may require separate licenses from those vendors.
Licensing notes
Free and open-source software licensed under GPLv3. Running commercial router images inside it may require separate vendor licenses.
Verification details
Last licensing verification recorded: 2026-10-28.
Directory record last updated: 2026-09-08. These are separate dates: a record update does not necessarily mean the publisher's terms changed.
AI-assisted summaries may be incomplete or outdated. Confirm licensing, pricing, and commercial-use rights in the official sources before making a business decision.
Frequently asked questions
Is GNS3 free to use?
Yes, GNS3 is free and open-source software licensed under GPLv3.
Do I need licenses for devices I use within GNS3?
While GNS3 is free, running commercial router images or other vendor-specific software within it may require separate licenses from those respective vendors.
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