Name: GNS3
Price: Free
Rating: 5 (1 reviews)

GNS3 overview

GNS3 is a graphical network simulator that allows simulation of complex networks.

To allow complete simulations, GNS3 is strongly linked with:

Dynamips, the core program that allows Cisco IOS emulation
Dynagen, a text-based front-end for Dynamips
Qemu, a generic and open source machine emulator and virtualizer
GNS3 is an excellent complementary tool to real labs for network engineers, administrators and people wanting to pass certifications such as CCNA, CCNP, CCIP, CCIE, JNCIA, JNCIS, JNCIE

Design of high quality and complex network topologies
Emulation of many Cisco IOS router platforms, IPS, PIX and ASA firewalls, JunOS
Simulation of simple Ethernet, ATM and Frame Relay switches
Connection of the simulated network to the real world!
Packet capture using Wireshark
Important notice: users have to provide their own IOS/IPS/PIX/ASA/JunOS to use with GNS3

What’s new in version 3.0.5

Replace "Docker hub" by "Docker repository" because it is possible to use different repositories
Upgrade dependencies
Fix bring console in front when clicking on "Open all consoles". Fixes #3706
Add -F arg to wmctrl. Ref #3706

Bundle web-ui v3.0.5
Sync appliances
Use Ubuntu 24.04 LTS in Dockerfile. Ref #2523
Fix tests and require Qemu version >= 2.4
Fix adding pci_bridges to qemu vms
Resolve deprecation warnings of regex library
Remove OVMF_CODE_4M.secboot.fd and associated code
Add edk2-stable202502 UEFI firmwares and try to first use firmwares from the ovmf package if installed. Fixes #2494
Prettify TPM error message
Fix bug in qemu_stdout message
Try to detect swtpm and AppArmor issue. Ref #3725
Fix Docker logs decoding. Ref #2522
Add delay after starting a Docker container and adding connections in uBridge. Ref #2522
Fix TypeError when reading Docker container logs. Ref #2522
Allow an image to be uploaded to the controller again even if it is already in the database
Fix controller not reporting an error if invalid options are passed to Qemu command line. Fixes #2517
Replace "Docker hub" by "Docker repository" because it is possible to use different repositories
Fix unable to add NAT cloud after configuring “allowed_interfaces” in configuration file. Fixes #2508
Fix interface information API endpoint for Cloud/NAT devices
Upgrade Jinja2 to v3.1.6. Fixes #2515
Fix packet capture for links connected to a cloud node. Fixes #2513
fix: check if remote-install.sh is being run as root