Hello,
I am not using an extra tool if that is what you are asking. To simulate several UEs I have modify your test_registration code with a for loop similar to the one in the following link:
https://forum.free5gc.org/t/is-it-possible-to-simulate-multiple-ues-through-test-sh/199/5?u=classo88
I’m currently executing everything in a single Linux machine (laptop). I have modified the configuration files to get a gtp tunney to internet similar to the user @thornton but I cannot get a ping outside my local network as well. This is another issue I have.
Is that helpful?