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Guide to the Secure Configuration of Fedora

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Configure ntpd To Run As ntp User

    ntp is a daemon which implements the Network Time Protocol (NTP). It is designed to synchronize system clocks across a variety of systems and use a...
    Rule Medium Severity
  • Specify Additional Remote NTP Servers

    Additional NTP servers can be specified for time synchronization in the file <code>/etc/ntp.conf</code>. To do so, add additional lines of the fol...
    Rule Unknown Severity
  • Specify a Remote NTP Server

    To specify a remote NTP server for time synchronization, edit the file <code>/etc/ntp.conf</code>. Add or correct the following lines, substituting...
    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...
    Group
  • Uninstall rsync Package

    The rsyncd service can be used to synchronize files between systems over network links. The <code>rsync</code> package can be removed with the foll...
    Rule Medium Severity
  • Ensure rsyncd service is disabled

    The rsyncd service can be disabled with the following command:
    $ sudo systemctl mask --now rsyncd.service
    Rule Medium Severity
  • 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 co...
    Group
  • Uninstall xinetd Package

    The xinetd package can be removed with the following command:
    $ sudo dnf erase xinetd
    Rule Low 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 oth...
    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 conf...
    Rule Unknown Severity
  • Uninstall rsh-server Package

    The rsh-server package can be removed with the following command:
    $ sudo dnf erase rsh-server
    Rule High Severity
  • Uninstall rsh Package

    The rsh package contains the client commands for the rsh services
    Rule Unknown 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 ...
    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 dnf 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 differe...
    Rule Medium Severity
  • Telnet

    The telnet protocol does not provide confidentiality or integrity for information transmitted on the network. This includes authentication informat...
    Group
  • Uninstall telnet-server Package

    The telnet-server package can be removed with the following command:
    $ sudo dnf erase telnet-server
    Rule High Severity
  • Remove telnet Clients

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

    TFTP is a lightweight version of the FTP protocol which has traditionally been used to configure networking equipment. However, TFTP provides littl...
    Group

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