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GEN005521 - The SSH daemon must restrict login ability to specific users and/or groups - '/etc/ssh/sshd_config AllowUsers'
Information
Restricting SSH logins to a limited group of users, such as system administrators, prevents password-guessing and other SSH attacks from reaching system accounts and other accounts not authorized for SSH access.Solution
Edit the SSH daemon configuration and add an 'AllowGroups' or 'AllowUsers' directive specifying the groups and users allowed to have access.Restart the SSH daemon.
# /sbin/service sshd restart
Alternatively, modify the /etc/pam.d/sshd file to include the line
account required pam_access.so accessfile=<path to access.conf for sshd>
If the 'accessfile' option is not specified the default 'access.conf' file will be used. The 'access.conf' file must contain the user restriction definitions.
See Also
http://iasecontent.disa.mil/stigs/zip/U_RedHat_5_V1R18_STIG.zip
Item Details
Category: ACCESS CONTROL
References: 800-53|AC-6(7)(b), Rule-ID|SV-37843r2_rule
Plugin: Unix
Control ID: dbd24cda8f6b5f9e431b40efd2462a40d3ffdabb1d8de5b8b8801c69deab7fa3