Do Public FTP Servers Require SSL/TLS Control Channel?

Abstract: This article discusses the necessity of SSL/TLS control channel for public FTP servers, with an example of IBM's FTP server. We'll show you how to connect to such servers using Linux shell FTP clients like lftp or ncftp.

Created: 2024-12-27 by UserComp.com Editors

Public FTP Servers Require SSL/TLS Control Channel

Overview

This article discusses the requirement for public FTP servers to use SSL/TLS for the control channel. A real-world example, www3.software.ibm.com, is provided to illustrate the concept.

Linux Shell FTP Clients

To connect to public FTP servers using SSL/TLS, you can use Linux shell FTP clients such as lftp or ncftp.

Example: Connecting with lftp

Assuming you have lftp installed on your Linux system, you can connect to the IBM FTP server using the following command:


        lftp -f -e 'open www3.software.ibm.com; user ; password ; set ssl:verify-certificate no; set ftp:ssl-allow no; mirror -R /

Books: -
Articles:
- FTP Security on z/OS
Online Resources:
- File Transfer Protocol
- FTP Security on z/OS

Tags: Linux FTP Security

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