Testing behind existing firewall

Hi everyone,

I have a older machine, intel 2600k, 16GB memory that I would like to set up ipfire on and test it out. It isn’t really so much about the features as I would like to familiarize myself with it in a safe setting. Can I set this up between my existing router/firewall device (it is a Ubiquiti USG) and it will still work okay? I read something about double NAT and needing to turn nat off at one device, but I don’t know if that is applicable?

Thanks!

yes you can