IBM z/OS SSL options for the TN3270 Telnet Server must specify a secure port.

Configuring the operating system to implement organization-wide security implementation guides and security checklists ensures compliance with federal standards and establishes a common security baseline across DoD that reflects the most restrictive security posture consistent with operational requirements. Configuration settings are the set of parameters that can be changed in hardware, software, or firmware components of the system that affect the security posture and/or functionality of the system. Security-related parameters are those parameters impacting the security state of the system, including the parameters required to satisfy other security control requirements. Security-related parameters include, for example: registry settings; account, file, directory permission settings; and settings for functions, ports, protocols, services, and remote connections.

Refer to the Profile configuration file specified on the PROFILE DD statement in the TCPIP started task JCL. If the following items are in effect for the configuration specified in the TCP/IP Profile configuration file, this is not a finding. Note: If an INCLUDE statement is coded in the TCP/IP Profile configuration file, the data set specified on this statement must be checked for the following items as well. Each TELNETPARMS block specifies TTLSPORT statement. If the CONNTYPE statement is present, it specifies SECURE.

Configure the TELNETPARMS block to specify TTLSPORT. If CONNTYPE is included in the TELNETPARMS block, it specifies SECURE.