is a public domain Unix TCP
command-line tool for building TCP client-server applications. It consists of super-server tcpserver
From "Life with qmail", Dave Sill, 2 January 2006 (Appendix B.3.): ucspi-tcp is an acronym for UNIX Client-Server Program Interface for TCP, and it's pronounced ooks-pie tee see pee.
tcpserver features built-in TCP Wrapper-like access control.
ucspi-tcp competes with several other programs:
- inetd, TCP server
- xinetd, a replacement for inetd
- mconnect client supplied as part of SunOS
- faucet and hose, part of the netpipes package