Any good tools/platforms that I can use to create virtual network device simulators?

Hey guys,

I'm testing a few systems and require logs from different network devices. Unfortunately, I cant gain access to the devices I want. So, I was wondering if there was a platform or a software that I can fireup, like a VM machine or an AWS instance, that can behave like a designated network device. Looking for firewalls, switches, routers, etc.

Appreciate any suggestions are advice on this topic.