Privileged ports, toffs of the Linux world. Kitten is a small web server that runs as a user-level service and would never need elevated privileges if it wasn’t for one archaic anti-security feature in Linux that dates back to the mainframe era: privileged ports. Back to the future As it was in Unix in the 1980s, so it is now, that any process that wants to bind to a port less than 1024 must have