I recently installed GNS3 as a VM on my ESXi server (free version). I did this to study for the new CCNA and Encore certs. I then run a GNS3 client on my Mac that connects to the VM. I’m limited on how many nodes I can have running in a project, because it becomes memory intensive on the server.

I’m running GNS3 server version 2.2.16

I recently upgraded my Macbook. OS X Big Sur has an issue with GNS3 client and will not start. I started using the GNS3 web gui http://[GNS3 server IP]:3080. This is working well for me, but occasionally the project will close. I’m guessing it’s a resource issue so I limit the number of nodes I turn on and save often.

I know it’s not secure, but I configured the Untangle firewall to allow port 3080 to the GNS3 server. The policy is only allowing my work’s public IP range. This is so I can access GNS3 web gui from work without using a VPN.