With so many methods for transferring information, it can be challenging to answer the most critical question: how should your company’s data be secured during transfer?
Use this article to learn about the differences between SFTP and SSH. However, it would be best first to comprehend a brief outline of the differences between FTP and SFTP.
FTP vs. SFTP: Key Differences in Security and File Transfer
FTP is the traditional file transfer protocol used by many organizations back in the day. It’s a straightforward method for sharing files over the Internet.
SFTP (Secure File Transfer Protocol) is a file transfer protocol that is similar to FTP, but it adds an extra layer of protection to the procedure.
When it comes to SFTP, you have several options for managing transfers. Businesses often opt for a cloud-based managed SFTP file-sharing service.
There are two types of cloud SFTP solutions to choose from: public cloud SFTP and private cloud SFTP.
- Public Cloud: These are cloud-based solutions hosted by large firms, such as Amazon Web Services or Microsoft Azure, and server space can be purchased to meet your company’s file storage and sharing needs.
- Private Cloud: Building and operating the network in-house is one option to construct a private cloud system. Outside suppliers can also host and maintain private cloud solutions.
The provider develops a Virtual Private Data Centre (VPDC) for each client, which is not connected to a shared network like public cloud solutions.
Read More: Best FileZilla Alternatives for Fast and Secure File Transfers
What Exactly is SSH or Shell Users?
Secure Shell (SSH) is an acronym for Secure Shell. In 1995, this protocol was initially implemented. Tatu Ylönen of the University of Helsinki designed it. SSH was developed as a secure version of the terminal emulator Telnet. This implies you can log into a remote computer and utilize it as if it were your own.
SFTP utilizes SSH (Secure Shell) encryption to safeguard data during transfer. When data is delivered to another party over the Internet, it is not exposed to other entities.
LIKE TELNET, an SSH terminal session gives you access to the distant computer’s command line rather than the desktop. The technology can also be used as a secure carrier that protects connections for other applications.
SSH is not extensively used as a standalone tool, although it is frequently at the center of commercially marketed remote access utilities. SSH-1 is the name of the first version of SSH. SSH Communications Security, a business founded by Ylönen, held this exclusive system. The Internet Engineering Task Force created SSH-2 as an open standard. This is a considerably more extensively used version than SSH-1, and the two are incompatible.
OpenSSH is the name of the third version of SSH. SSH-2’s functionality has more or less integrated with this. The most popular version of SSH is OpenSSH.
SSH is compatible with most operating systems, including Unix, Linux, macOS, and Windows.
SFTP vs. Secure Shell (SSH) Users: Similarities
SFTP can’t exist without SSH because it relies on it to securely transfer files. To put it another way, the SSH protocol is used in the SFTP file transfer mechanism. In fact, most SSH servers come with SFTP support. Not all SFTP servers support SSH commands and actions.
SSH and SFTP share many similarities. You may be employing one or both of them without fully comprehending how they operate and how they might be utilized to their full potential.
Without SSH, SFTP cannot function. Consider SSH to be an enclosure surrounding SFTP. SSH first creates a connection and agrees on a transmission encryption key. The key is then used to encrypt all FTP transactions that occur during that session. SSH and SFTP are the same thing in terms of security.
The primary purpose of SFTP is to provide a secure method for file transmission. No alternative to SFTP runs without security, and no other protocol can be used to secure SFTP.
SFTP vs. Secure Shell (SSH)Users: Differences
Although both are used to transfer data securely, SSH, unlike SFTP, can stand alone. Remote command-line, login, and remote command execution are typical SSH applications.
SFTP is a file transfer protocol that enables users to securely access, transfer, and manage files over a secure data stream. It can, however, send remote operating system file handling and directory commands. These include instructions like creating directories, copying, or relocating files.
SSH grants complete access to the operating system of the distant computer to which it is linked. On the other hand, SSH cannot transport files on its own.
How to Create an SFTP Only User Using SSH with Chroot Setup and Troubleshooting
SFTP stands for SSH File Transfer Protocol, and it works over the underlying SSH protocol to provide a secure file transfer mechanism. When you create an SFTP-only user, you allow file access and file operations on a remote server without granting remote command line access or shell access. This approach enables system administrators to maintain secure remote access while minimizing risk.
An SFTP user relies on an SSH connection and uses the client-server model for secure communication. The SSH secure shell establishes an encrypted channel that protects data transfer and user authentication.
SFTP encrypts credentials and files in transit, making it a go-to protocol for secure data transfer and remote server management. Most teams use key-based authentication, which involves the use of public and private keys, instead of password-based authentication for secure logins.
To restrict a user to SFTP only, administrators configure the SSH service to force the SFTP protocol and block access to the command-line interface.
A chroot setup limits the user to a specific directory, which improves file management capabilities and prevents access to other network services or parts of the remote system. This method ensures that users can securely upload, download, and manage files through an SFTP client or graphical user interface without the ability to execute commands.
Common issues often appear during setup. Permission errors typically occur when directory ownership does not comply with SSH requirements. Connection failures may happen if the secure channel cannot be initialized due to misconfigured authentication methods or missing SSH keys.
Administrators should also verify that the SSH connection uses the correct port and that secure tunneling does not conflict with port forwarding rules. With proper configuration, SFTP stands as a secure protocol that delivers reliable data stream handling and controlled file management.
SFTP vs Shell Users Security Permissions and Risk Comparison
Understanding the key differences between SFTP users and shell users is critical for secure remote server management. Both SSH-based access methods rely on secure communication and encrypted channels, but they serve different purposes and carry different risk levels. SFTP focuses on file operations, while shell access enables full remote system access.
An SFTP user can perform secure file transfer, directory listing, and file management tasks over an SSH connection. This user cannot execute commands, access other network services, or interact with the command line interface.
SFTP relies on secure authentication methods such as public key authentication and SSH keys to protect file access. Because the scope remains limited, SFTP offers a safe method for data transfer with reduced exposure.
Shell users receive remote shell access through Secure Shell (SSH). This access allows users to execute commands, manage processes, configure services, and interact directly with the remote system. While this level of control benefits developers and system administrators, it also increases security risks. A compromised private key or weak authentication method can expose the entire remote server.
From a permissions standpoint, SFTP users operate within strict boundaries. Administrators can isolate them using chroot environments and restrict their file management capabilities.
Shell users require broader permissions to perform tasks such as software updates and configuring network protocols. This increased access necessitates the use of robust, secure authentication methods, regular key rotation, and ongoing monitoring.
In terms of risk comparison, SFTP offers secure data transfer with minimal attack surface. Shell access provides flexibility but demands stronger controls. Choosing between the two SSH options depends on operational needs, security policies, and the level of trust assigned to each user.
When to Use SFTP Only Users vs Shell Users with Real World Use Cases
Choosing between SFTP-only users and shell users depends on the level of control a user requires over a remote server. Both SSH-based options support secure remote access, but each is suited to different real-world scenarios and operational requirements.
SFTP-only users work best when file access remains the primary need. Web agencies often use SFTP to securely upload website assets to a remote server, thereby avoiding exposure to remote command line access. Finance teams rely on the SFTP protocol for secure data transfer of reports and backups. In these cases, SFTP stands out as a secure protocol that protects data through encrypted channels and key-based authentication. Users connect through an SFTP client or a graphical user interface, focusing solely on file operations.
Shell users suit environments where active server interaction matters. Developers need remote shell access to deploy applications, run scripts, and debug issues. System administrators require command-line access to manage network services, configure secure SSH tunnels, and monitor system performance. Shell access supports advanced features, including port forwarding, secure tunneling, and interaction with other network services.
Automation also influences the choice. CI pipelines and scheduled jobs often utilize SSH keys, including both public and private keys, for secure authentication. These setups may require limited command execution, making restricted shell access more suitable than SFTP alone.
In practice, many organizations use both SSH access types together. They grant SFTP users for secure file transfer and assign shell access only to trusted roles. This balanced approach enhances secure communication, safeguards the remote system, and facilitates efficient remote server management without undue risk.
Your Takeaway
By now, you should have a clear understanding of when to use FTP and when not to. Additionally, we believe that you are now able to distinguish between SSH and SFTP for secure file transfer.
I hope you have a clear understanding of these terminologies in a nutshell.
If you believe we have missed something or require further clarification and assistance, please do not hesitate to contact us.
FAQs About the Difference Between SFTP And Shell Users
Is SFTP the same as SSH?
No. SFTP and SSH are closely related, but they serve different purposes. SSH provides remote login and command-line access to a remote system. SFTP is a secure file transfer protocol that runs over SSH. It focuses only on file transfer and file management. Both use a secure connection and encrypted communication, but their key differences lie in access and functionality.
How does SFTP ensure secure file transfers?
SFTP uses SSH to create a secure method for file transfer. It encrypts data and credentials during transit. This prevents interception and tampering. SFTP also supports key-based authentication, which strengthens security during remote access and file transfers.
Can I use SFTP without command line access?
Yes. An SFTP client allows file transfer without command-line usage. Users can securely upload and download files using a graphical interface. This makes SFTP ideal for users who require secure file transfers without the need for remote login or shell access.
When should I choose SFTP over SSH shell access?
Choose SFTP when you only need file transfer. It limits user actions to file operations, reducing risk. Use SSH shell access when you need remote access for administration, command execution, or troubleshooting. This distinction highlights the key differences between SFTP and SSH usage.
Does SFTP support port forwarding and advanced SSH features?
No. SFTP does not support port forwarding or advanced remote access features. Those features are associated with SSH shell sessions. SFTP and SSH share the same secure protocol, but SFTP focuses strictly on secure file transfer and not command-line operations.
