I read the answers and I am wondering if I should change what I do.
I use the exact same domains and sundomains internally and externally. I simply have a DNS internally that will answer requests with local IP.
So I don't have to address my machines with a different name when I am outside or inside.
Can someone explain to me what I missed ?
"The little schemer" and "The seasoned schemer" behind their naïve approach are really really good books on lisp.