Ensure FTP.DATA configuration statements enforce AT- TLS protection

HighLevel 1Manual reviewibm-z

Description

During the TLS handshake process, mutually acceptable suite of cryptographic algorithms is selected by the server and client. The algorithms specified in the selected suite are used to cryptographically protect the data that subsequently flows between the two. To apply TLS protection of adequate strength, the FTP daemon must be configured to use AT-TLS protection.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

Request a copy of the FTP server configuration statements in FTP.DATA for any active site FTP server started tasks. Verify that:. The EXTENSIONS statement is coded with the AUTH_TLS value The SECURE_CTRLCONN statement is coded with the PRIVATE value The SECURE_DATACONN statement is coded with the PRIVATE or SAFE value The SECURE_FTP statement is coded with the REQUIRED value The TLSCERTCROSSCHECK statement is omitted or is commented out or is coded with the TRUE value The TLSMECHANISM statement is coded with the ATTLS value The TLSRFCLEVEL statement is ... (full steps: CIS section 6.2.4)

How it is fixed

Fix method: Guidance or infrastructure patch

The site will need to follow their standard change management process for updating FTP server configuration statements in FTP.DATA with compliant values.

Properties

Operating systems: Any
Tags: ibm-znetwork
Reference: CIS IBM z/OS with RACF Benchmark v1.0.0 - 6.2.4 Ensure FTP.DATA configuration statements enforce AT- TLS protection