... login line and is dutifully recorded in the btmp file. If the file is world readable, anyone can come along and look for such entries. They can then guess, using the who command and login times, ... it is easy to understand why administrators are bypassing the basics in favor of these tools and the hype that surrounds them. Intrusion detection systems, firewalls, and other perimeter defense ... program and goes awayOn a UNIX operating system, the Internet daemon, inetd, listens for connections and services them upon arrival. It does this by starting the requested server and then handing...