[ 源代码： tcp-wrappers ]
软件包：libwrap0-dev（7.6.q-32）
Wietse Venema's TCP wrappers library, development files
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.