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The IBM z/OS UNIX Telnet server warning banner must be properly specified.


Finding ID Version Rule ID IA Controls Severity
V-224103 TSS0-UT-000050 SV-224103r864513_rule Medium
Display of a standardized and approved use notification before granting access to the operating system ensures privacy and security notification verbiage used is consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. System use notifications are required only for access via logon interfaces with human users and are not required when such human interfaces do not exist.
IBM z/OS TSS Security Technical Implementation Guide 2022-09-19


Check Text ( C-25776r516708_chk )
From the ISPF Command Shell enter:
cat inetd.conf

If the otelnet startup command includes option "-h" this is a finding.
Fix Text (F-25764r516709_fix)
The otelnetd startup command should not include the option "-h", where:

-h indicates that the logon banner should not be displayed.