The tcpwrappers package contains tcpd, tcpdchk, tcpdmatch, try-from and safe_finger. tcpd is the main access control daemon for all internet services, which inetd or xinetd will run instead of running the requested service daemon. tcpdchk is a tool to examine a tcpd wrapper configuration and report problems with it. tcpdmatch is used to predict how the tcp wrapper would handle a specific request for a service. try-from can be called via a remote shell command to find out if the host name and address are properly recognized. safe_finger is a wrapper for the finger utility, to provide automatic reverse name lookups.