Every significant attack nowadays is a multi stage one. So you should make it as hard as possible to th attackers, even though they have enteredto your interstructure at this point. We use t l s, even in private networks, because i know that clog providers have virtual lants which are also often crypted. But still, it's just another layer. You cannot have enough layers to protect yourself at this point,. Because if some one intrutes you, you don't want them to sniff passforts out of your traffic and things like that. The list goes on. I think the worst thing that's happened for us is dedos attack, and that’s about