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Guide to the Secure Configuration of Debian 10

Rules, Groups, and Values defined within the XCCDF Benchmark

  • Allow Only SSH Protocol 2

    Only SSH protocol version 2 connections should be permitted. The default setting in <code>/etc/ssh/sshd_config</code> is correct, and can be verifi...
    Rule High Severity
  • Disable Compression Or Set Compression to delayed

    Compression is useful for slow network connections over long distances but can cause performance issues on local LANs. If use of compression is req...
    Rule Medium Severity
  • Disable SSH Access via Empty Passwords

    Disallow SSH login with empty passwords. The default SSH configuration disables logins with empty passwords. The appropriate configuration is used ...
    Rule High Severity
  • Disable GSSAPI Authentication

    Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like GSSAPI. <br> The default SSH configuration disallows ...
    Rule Medium Severity
  • Disable Kerberos Authentication

    Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms like Kerberos. <br> The default SSH configuration disallow...
    Rule Medium Severity
  • Disable PubkeyAuthentication Authentication

    Unless needed, SSH should not permit extraneous or unnecessary authentication mechanisms. To disable PubkeyAuthentication authentication, add or co...
    Rule Medium Severity
  • Disable SSH Support for .rhosts Files

    SSH can emulate the behavior of the obsolete rsh command in allowing users to enable insecure access to their accounts via <code>.rhosts</code> fil...
    Rule Medium Severity
  • Disable SSH Support for Rhosts RSA Authentication

    SSH can allow authentication through the obsolete rsh command through the use of the authenticating user's SSH keys. This should be disabled. <br><...
    Rule Medium Severity
  • Disable SSH Root Login

    The root user should never be allowed to login to a system directly over a network. To disable root login via SSH, add or correct the following lin...
    Rule Medium Severity
  • Disable SSH root Login with a Password (Insecure)

    To disable password-based root logins over SSH, add or correct the following line in <code>/etc/ssh/sshd_config</code>: <pre>PermitRootLogin pro...
    Rule Medium Severity

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