SLEM 5 must limit the number of concurrent sessions to 10 for all accounts and/or account types.

SLEM 5 management includes the ability to control the number of users and user sessions that use a SLEM 5. Limiting the number of allowed users and sessions per user is helpful in reducing the risks related to denial-of-service (DoS) attacks.

This requirement addresses concurrent sessions for information system accounts and does not address concurrent sessions by single users via multiple system accounts. The maximum number of concurrent sessions should be defined based on mission needs and the operational environment for each system.

Verify SLEM 5 limits the number of concurrent sessions to 10 for all accounts and/or account types with the following command:

     > grep "maxlogins" /etc/security/limits.conf
     * hard maxlogins 10

If the "maxlogins" does not have a value of "10" or less, is commented out, or is missing, this is a finding.

Configure SLEM 5 to limit the number of concurrent sessions to "10" or less for all accounts and/or account types.

Add or modify the following line to the file "/etc/security/limits.conf":

* hard maxlogins 10