Connect GNS3 to the Internet "No ROOT"

The Idea Here is by making "TUN/TAP device { tap0 }" for your normal user.

root@temp:~# ip tuntap add dev tap0 mode tap user {user} group {user}

Then add it to one of our existing bridges:

root@temp:~# brctl addif virbr0 tap0

Last step make the state to up:

root@temp:~# ip link set tap0 up

And start GNS3 as Normal user Add Cloud to the Map , go to the tab "NIO TAP" and add our previously created.

Thanks To Source

Note : You Should Have " virbr0 " Bridge