IBM z/OS PROFILE.TCPIP configuration statements for the TCP/IP stack must be coded properly.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223599	ACF2-TC-000010	SV-223599r533198_rule		Medium

Description
Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

Description

Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best. Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless. Automated monitoring of remote access sessions allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

STIG	Date
IBM z/OS ACF2 Security Technical Implementation Guide	2021-03-29

Details

Check Text ( C-25272r504764_chk )
Refer to the Profile configuration file specified on the PROFILE DD statement in the TCPIP started task JCL. NOTE: If the 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. If the SMFPARMS statement is not coded or commented out, this is not a finding. If the DELETE statement is not coded or commented out for production system, this is not a finding. If the SMFCONFIG statement is coded with (at least) the FTPCLIENT and TN3270CLIENT operands, this is not a finding. If the TCPCONFIG and UDPCONFIG statements are coded with (at least) the RESTRICTLOWPORTS operand, this is not a finding. NOTE: If the INCLUDE statement is coded, the data set specified will be checked for access authorization compliance.

Check Text ( C-25272r504764_chk )

Refer to the Profile configuration file specified on the PROFILE DD statement in the TCPIP started task JCL.

NOTE: If the 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.

If the SMFPARMS statement is not coded or commented out, this is not a finding.

If the DELETE statement is not coded or commented out for production system, this is not a finding.

If the SMFCONFIG statement is coded with (at least) the FTPCLIENT and TN3270CLIENT operands, this is not a finding.

If the TCPCONFIG and UDPCONFIG statements are coded with (at least) the RESTRICTLOWPORTS operand, this is not a finding.

NOTE: If the INCLUDE statement is coded, the data set specified will be checked for access authorization compliance.

Fix Text (F-25260r504765_fix)
Configure the statements in the PROFILE.TCPIP file to conform to the specifications below: NOTE: If the 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. The SMFPARMS statement is not coded or commented out. The DELETE statement is not coded or commented out for production systems. The SMFCONFIG statement is coded with (at least) the FTPCLIENT and TN3270CLIENT operands. The TCPCONFIG and UDPCONFIG statements are coded with (at least) the RESTRICTLOWPORTS operand. NOTE: If the INCLUDE statement is coded, the data set specified will be checked for access authorization compliance in STIG ID ITCP0070.

Fix Text (F-25260r504765_fix)

Configure the statements in the PROFILE.TCPIP file to conform to the specifications below:

NOTE: If the 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.

The SMFPARMS statement is not coded or commented out.
The DELETE statement is not coded or commented out for production systems.
The SMFCONFIG statement is coded with (at least) the FTPCLIENT and TN3270CLIENT operands.
The TCPCONFIG and UDPCONFIG statements are coded with (at least) the RESTRICTLOWPORTS operand.

NOTE: If the INCLUDE statement is coded, the data set specified will be checked for access authorization compliance in STIG ID ITCP0070.