libwrap0 7.6.q-31 (amd64 binary) in ubuntu hirsute

 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.