inetd
The subsystem in UNIX responsible for starting most of the network services. This program works from the principle that one service can listen for incoming traffic on a socket, and when such traffic appears, it can launch the appropriate service to handle it. This allows a single box to support many services without actually having them all run at the same time. The file /etc/inetd.conf configures this service. Key point: A common backdoor technique is to place a root shell program in inetd.conf.
Current version: SUSE
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