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C2S for Red Hat Enterprise Linux 7

Rules and Groups employed by this XCCDF Profile

  • Network Time Protocol

    The Network Time Protocol is used to manage the system clock over a network. Computer clocks are not very accurate, so time will drift unpredictably on unmanaged systems. Central time protocols can...
    Group
  • Enable the NTP Daemon

    Run the following command to determine the current status of the <code>chronyd</code> service: <pre>$ sudo systemctl is-active chronyd</pre> If the service is running, it should return the follow...
    Rule Medium Severity
  • Obsolete Services

    This section discusses a number of network-visible services which have historically caused problems for system security, and for which disabling or severely limiting the service has been the best a...
    Group
  • Xinetd

    The <code>xinetd</code> service acts as a dedicated listener for some network services (mostly, obsolete ones) and can be used to provide access controls and perform some logging. It has been large...
    Group
  • Install tcp_wrappers Package

    When network services are using the <code>xinetd</code> service, the <code>tcp_wrappers</code> package should be installed. The <code>tcp_wrappers</code> package can be installed with the following...
    Rule Medium Severity
  • Disable xinetd Service

    The xinetd service can be disabled with the following command:
    $ sudo systemctl mask --now xinetd.service
    Rule Medium Severity
  • NIS

    The Network Information Service (NIS), also known as 'Yellow Pages' (YP), and its successor NIS+ have been made obsolete by Kerberos, LDAP, and other modern centralized authentication services. NIS...
    Group
  • Remove NIS Client

    The Network Information Service (NIS), formerly known as Yellow Pages, is a client-server directory service protocol used to distribute system configuration files. The NIS client (<code>ypbind</cod...
    Rule Unknown Severity
  • Uninstall ypserv Package

    The ypserv package can be removed with the following command:
    $ sudo yum erase ypserv
    Rule High Severity
  • Rlogin, Rsh, and Rexec

    The Berkeley r-commands are legacy services which allow cleartext remote access and have an insecure trust model.
    Group
  • Uninstall rsh Package

    The rsh package contains the client commands for the rsh services
    Rule Unknown Severity
  • Disable rexec Service

    The <code>rexec</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as a systemd socket, should be disabled. If using xine...
    Rule High Severity
  • Disable rlogin Service

    The <code>rlogin</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as a systemd socket, should be disabled. If using xin...
    Rule High Severity
  • Disable rsh Service

    The <code>rsh</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as a systemd socket, should be disabled. If using xinetd...
    Rule High Severity
  • Remove Rsh Trust Files

    The files <code>/etc/hosts.equiv</code> and <code>~/.rhosts</code> (in each user's home directory) list remote hosts and users that are trusted by the local system when using the rshd daemon. To re...
    Rule High Severity
  • Chat/Messaging Services

    The talk software makes it possible for users to send and receive messages across systems through a terminal session.
    Group
  • Uninstall talk-server Package

    The talk-server package can be removed with the following command:
     $ sudo yum erase talk-server
    Rule Medium Severity
  • Uninstall talk Package

    The <code>talk</code> package contains the client program for the Internet talk protocol, which allows the user to chat with other users on different systems. Talk is a communication program which ...
    Rule Medium Severity
  • Telnet

    The telnet protocol does not provide confidentiality or integrity for information transmitted on the network. This includes authentication information such as passwords. Organizations which use tel...
    Group
  • Remove telnet Clients

    The telnet client allows users to start connections to other systems via the telnet protocol.
    Rule Low Severity

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