libwrap0 7.6.dbs-9 (amd64 binary) in ubuntu feisty

 Wietse Venema's network logger, also known as TCPD or LOG_TCP.
 .
 These programs log the client host name of incoming telnet,
 ftp, rsh, rlogin, finger etc. requests. Security options are:
 access control per host, domain and/or service; detection of
 host name spoofing or host address spoofing; booby traps to
 implement an early-warning system.