tcpd(8)                             CLIX                             tcpd(8)



  NAME

    tcpd - Remote connection access control server

  SYNOPSIS

    /usr/ip32/tcpip/secure/tcpd

  DESCRIPTION

    The tcpd server provides access control for incoming requests for
    connection to any network service listed in the /etc/inetd.conf file.
    When a remote connection request is received by the local host, if the
    TCP/IP log utility (see log(8)) has been started, inetd invokes the tcpd
    server.  The tcpd server then reads the /etc/hosts.allow and
    /etc/hosts.deny files to determine whether connection access should be
    granted or denied to the incoming connection request.  If access is
    granted, the appropriate network service daemon is invoked.  If access is
    denied, the connection is refused.  All requests and their outcome are
    logged to the file /usr/adm/tcp_log.

    After the request is logged and the remote host address is mapped to a
    hostname, tcpd verifies that the hostname maps to the same host address.
    If the name does not map to the address, then the connection is refused.

  EXAMPLES

    The tcpd daemon is invoked by inetd (if the log utility has been started).

  FILES

    /etc/hosts.allow
           Host access control file listing remote clients and the local
           network services to which they are to be granted access.

    /etc/hosts.deny
           Host access control file listing remote clients and the local
           network services to which they are to be denied access.

    /etc/inetd.conf
           Configuration file for inetd.

    /usr/adm/tcp_log
           TCP/IP remote connection access control log file.

  DIAGNOSTICS

    All diagnostic messages are logged to the file /usr/adm/tcp_log.

  RELATED INFORMATION




  2/94 - Intergraph Corporation                                              1

  tcpd(8)                             CLIX                             tcpd(8)



    Commands:  inetd(8), log(8)

    Files:  hosts.allow(4), inetd.conf(4), tcp_log(4)



















































  2                                              Intergraph Corporation - 2/94