Starting over.... some lessons learned

Both servers have been done for a while. They are now expecting some work to do…

Now, I have a few questions that have been posted in these forums.

All these, except perhaps DNS which is probably a readup for what goes on small networks, but still very applicable, are showstoppers with no relevant answer so far.

While I could start running sites despite lacking a couple of answers to those, I will not throw myself in a situation where someone tells me “but you should have done that before setting up the sites, now you have to redo everything if you want this or that to work”