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CIS Ubuntu 22.04 Level 2 Server Benchmark

Rules and Groups employed by this XCCDF Profile

  • Uninstall nginx Package

    The nginx package can be removed with the following command:
    $ apt-get remove nginx
    Rule Unknown Severity
  • IMAP and POP3 Server

    Dovecot provides IMAP and POP3 services. It is not installed by default. The project page at <a href="http://www.dovecot.org">http://www.dovec...
    Group
  • Disable Cyrus IMAP

    If the system does not need to operate as an IMAP or POP3 server, the Cyrus IMAP software should be removed.
    Group
  • Uninstall cyrus-imapd Package

    The cyrus-imapd package can be removed with the following command:
    $ apt-get remove cyrus-imapd
    Rule Unknown Severity
  • Disable Dovecot

    If the system does not need to operate as an IMAP or POP3 server, the dovecot software should be disabled and removed.
    Group
  • Uninstall dovecot Package

    The dovecot-core package can be removed with the following command:
    $ apt-get remove dovecot-core
    Rule Unknown Severity
  • LDAP

    LDAP is a popular directory service, that is, a standardized way of looking up information from a central database. Ubuntu 22.04 includes software ...
    Group
  • Configure OpenLDAP Clients

    This section provides information on which security settings are important to configure in OpenLDAP clients by manually editing the appropriate con...
    Group
  • Ensure LDAP client is not installed

    The Lightweight Directory Access Protocol (LDAP) is a service that provides a method for looking up information from a central database. The <code>...
    Rule Low Severity
  • Configure OpenLDAP Server

    This section details some security-relevant settings for an OpenLDAP server.
    Group
  • Uninstall openldap-servers Package

    The slapd package is not installed by default on a Ubuntu 22.04 system. It is needed only by the OpenLDAP server, not by the clients which use LDAP...
    Rule Low Severity
  • Mail Server Software

    Mail servers are used to send and receive email over the network. Mail is a very common service, and Mail Transfer Agents (MTAs) are obvious target...
    Group
  • Ensure Mail Transfer Agent is not Listening on any non-loopback Address

    Mail Transfer Agents (MTA), such as sendmail and Postfix, are used to listen for incoming mail and transfer the messages to the appropriate user or...
    Rule Medium Severity
  • Configure SMTP For Mail Clients

    This section discusses settings for Postfix in a submission-only e-mail configuration.
    Group
  • Disable Postfix Network Listening

    Edit the file <code>/etc/postfix/main.cf</code> to ensure that only the following <code>inet_interfaces</code> line appears: <pre>inet_interfaces =...
    Rule Medium Severity
  • NFS and RPC

    The Network File System is a popular distributed filesystem for the Unix environment, and is very widely deployed. This section discusses the circ...
    Group
  • Uninstall nfs-kernel-server Package

    The nfs-kernel-server package can be removed with the following command:
    $ apt-get remove nfs-kernel-server
    Rule Low Severity
  • Disable All NFS Services if Possible

    If there is not a reason for the system to operate as either an NFS client or an NFS server, follow all instructions in this section to disable sub...
    Group
  • Disable Services Used Only by NFS

    If NFS is not needed, disable the NFS client daemons nfslock, rpcgssd, and rpcidmapd. <br><br> All of these daemons run with elevated privileges, a...
    Group
  • Uninstall rpcbind Package

    The rpcbind utility maps RPC services to the ports on which they listen. RPC processes notify rpcbind when they start, registering the ports they a...
    Rule Low Severity

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