!! 🙂 do you think that was detrimental to your learning administration i.e. GPO etc.? I ask as I'm almost where you were when you started this a year + ago and am just trying to follow the book, which has surprisingly little errata. Is it better to just blow off that part (inbound rules) open the firewalls and keep moving or will it come back and bite me in later chapters? When something doesn't work I always assume user error (me) and can spend days researching and tweaking it.