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Status Not under consideration
Workspace IBM i
Categories Networking
Created by Guest
Created on Jan 11, 2024

RELATED IDEAS

Add a WRKFCNUSG QIBM_QTMF_SERVER_REQ* option to restrict the system ftp subcommand.

Any ftp client can log into the server and use the ftp subcommand system to determine the name of the OS and what level it is running. IBM does try to obfuscate the information provided by using the name of an OS long discontinued (OS/400) instead of the current (IBM i).

> system

215 OS/400 is the remote operating system. The TCP/IP version is "V7R5M0".

There's a number of reasons why I'd like to disable the system subcommand:

1 - Knowing the name of the OS allows nefarious individuals to perform a more targeted attack.

2 - Knowing the level of the OS may notify a nefarious user that this may be an obsolete version of the OS and may be less likely to have recent security patches.

3 - If a person is in IBM Early Programs it may be considered a violation of NDA for someone to see: The TCP/IP version is "rNext".

4 - (minor petty) Neither OS/400 nor IBM i are registered with IANA: https://www.iana.org/assignments/operating-system-names/operating-system-names.xhtml

Note: Since IBM i's ftp client runs system when doing ftp from one IBM i to another will this cause an issue if system is disabled?

230 ROB logged on.

OS/400 is the remote operating system. The TCP/IP version is "V7R5M0".

250 Now using naming format "0".

257 "ROB" is current library.

Idea priority Low
  • Guest
    Reply
    |     Aug 27, 2024
    IBM does not intend to provide a solution to this Idea at this time, so it is being closed.
    Thank you for taking the time to submit your Idea.
    After careful consideration, we know that we cannot deliver your requested enhancement soon,
    so it is being declined.
    However, your Idea does align with the future strategy of our product and we believe it may have
    future value, so we will add it to an internal list for us to keep in mind for the future.

    IBM Power Systems Development
  • Guest
    Reply
    |     Jul 12, 2024
    IBM has received your Idea and is evaluating it. IBM will provide a response after evaluation is complete.

    IBM Power Systems Development

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