What is SSH and how does it work in the context of network security and remote access?

SSH, which stands for Secure Shell, is a cryptographic network protocol that provides a secure way to access and manage remote systems over an unsecured network. It is widely used for secure remote administration of servers and for secure file transfers.SSH works by establishing an encrypted connection between a client and a server. When a user initiates an SSH connection, the client and server perform a handshake to establish a secure channel. This involves negotiating encryption algorithms, authenticating the server, and optionally authenticating the client.In terms of network security, SSH provides several key features:Encryption: SSH encrypts all data transmitted between the client and server, including passwords, commands, and data transfers. This prevents eavesdropping and protects against data interception.Authentication: SSH supports various authentication methods, including password-based authentication, public key authentication, and two-factor authentication. This ensures that only authorized users can access the remote system.Integrity: SSH uses cryptographic algorithms to ensure the integrity of data. This means that any tampering or modification of data during transmission will be detected.Port Forwarding: SSH allows for secure tunneling of network connections. This means that users can securely access services on a remote network as if they were directly connected to it.Overall, SSH enhances network security by providing secure remote access and management capabilities. It protects sensitive information, prevents unauthorized access, and ensures the integrity of data transmitted over the network.

How does the NAS QNAP SS-EC1879U-SAS-RP utilize SSH protocol to enhance its functionality and security features?

The NAS QNAP SS-EC1879U-SAS-RP utilizes the SSH (Secure Shell) protocol to enhance its functionality and security features in several ways:Secure Remote Access: SSH allows users to securely access the NAS remotely over the network. By encrypting the communication between the client and the NAS, SSH ensures that sensitive data, such as login credentials and file transfers, are protected from eavesdropping and unauthorized access.Secure File Transfers: SSH supports secure file transfers using protocols like SFTP (SSH File Transfer Protocol) and SCP (Secure Copy). These protocols encrypt the data during transit, preventing any tampering or interception of files being transferred to or from the NAS.Secure Shell Environment: SSH provides a secure shell environment that allows users to execute commands on the NAS remotely. This functionality enables administrators to manage and configure the NAS without physically being present at the device, enhancing convenience and accessibility while maintaining security.Authentication and Encryption: SSH utilizes public-key cryptography for authentication, ensuring that only authorized users can access the NAS. It also supports password-based authentication, but the use of public-key authentication is generally recommended for higher security. Additionally, SSH encrypts all communication between the client and the NAS, protecting the data from unauthorized access.Tunneling and Port Forwarding: SSH allows users to create secure tunnels and forward ports between the client and the NAS. This feature is useful for accessing services hosted on the NAS securely, even if they are not directly accessible from outside the network. It ensures that the data transmitted through the tunnel remains encrypted and secure.Overall, the utilization of SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP enhances both the functionality and security of the device by providing secure remote access, encrypted file transfers, secure shell environment, strong authentication, and encrypted communication.

Can you explain the specific benefits and advantages of using SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP for secure file transfers and remote administration?

Using the SSH (Secure Shell) protocol in the NAS QNAP SS-EC1879U-SAS-RP for secure file transfers and remote administration provides several benefits and advantages:Secure Communication: SSH ensures secure communication between the client and the NAS device by encrypting the data transmitted over the network. This prevents unauthorized access and protects sensitive information from being intercepted.Authentication: SSH uses public-key cryptography for authentication, which is more secure than traditional password-based authentication. This ensures that only authorized users can access the NAS device remotely.Secure File Transfers: SSH protocol supports secure file transfers using protocols like SFTP (SSH File Transfer Protocol) or SCP (Secure Copy). These protocols encrypt the data during transit, ensuring the confidentiality and integrity of the transferred files.Remote Administration: SSH provides a secure way to remotely administer the NAS device. It allows administrators to securely access the command-line interface (CLI) or execute remote commands on the NAS device. This enables efficient management and configuration of the device from anywhere in the world.Portability: SSH is a widely supported protocol and available on various operating systems, making it a versatile choice for secure remote administration and file transfers. It allows users to connect to the NAS device from different platforms and devices.Firewall-Friendly: SSH protocol typically uses port 22 for communication, which is commonly allowed through firewalls. This ensures that SSH connections can be established even when other ports are blocked, simplifying remote access to the NAS device.Two-Factor Authentication (2FA): QNAP NAS devices often support two-factor authentication for SSH connections. This adds an extra layer of security by requiring users to provide a second form of authentication, such as a verification code from a mobile app or a physical token.By leveraging the SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP, users can enjoy secure and encrypted file transfers, robust remote administration capabilities, and enhanced protection against unauthorized access.

RAID Array Recovery on NAS QNAP SS-EC1879U-SAS-RP: How to Handle Recovery When It Breaks

Name: How to recover data from a QNAP
Uploaded: 2025-10-16T08:53:56+03:00
Description: How to recover data from a QNAP

Has your NAS QNAP SS-EC1879U-SAS-RP suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

RAID Array Recovery on NAS QNAP SS-EC1879U-SAS-RP: How to Handle Recovery When It Breaks

Data Recovery Tool

QNAP SS-EC1879U-SAS-RP NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an SS-EC1879U-SAS-RP. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Contents

Why Regular Data Recovery Tools Can’t Restore Files from RAID
Key Information About the NAS QNAP SS-EC1879U-SAS-RP
How to Remove Hard Disks from Your NAS and Connect Them to a PC

RAID Recovery™ 2.8

Recover data from damaged RAID arrays inaccessible from a computer.

Download

Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like QNAP often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

How can network issues impact the data stored on NAS QNAP SS-EC1879U-SAS-RP devices?

Network issues can impact the data stored on NAS QNAP SS-EC1879U-SAS-RP devices in several ways:

Slow data transfer: Network issues such as high latency, packet loss, or limited bandwidth can result in slow data transfer speeds between the NAS device and connected clients. This can affect the performance of applications accessing the data, causing delays and reduced productivity.
Data corruption: Network interruptions or unstable connections can lead to data corruption during file transfers. If the network connection drops or experiences errors while data is being written to or read from the NAS device, it can result in incomplete or corrupted files.
Inaccessibility: Network issues can cause the NAS device to become inaccessible from connected clients. This can prevent users from accessing or modifying their data stored on the device, leading to workflow disruptions and potential data loss.
Backup and replication failures: NAS devices often utilize network connections to perform backups and replication tasks. Network issues can cause these processes to fail, resulting in incomplete or inconsistent backups. This can compromise data protection and disaster recovery capabilities.
Limited scalability: Network issues can limit the scalability of NAS devices. If the network infrastructure is not capable of handling increased data traffic or additional clients, the performance of the NAS device may degrade, impacting data accessibility and overall system performance.

To mitigate the impact of network issues on NAS devices, it is essential to ensure a robust and reliable network infrastructure. This includes using high-quality network cables, switches, and routers, as well as monitoring and addressing any network performance issues promptly. Regular backups and implementing redundancy measures can also help protect data in case of network-related incidents.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS SS-EC1879U-SAS-RP can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

Power off the NAS and disconnect it from the power source.

WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.
Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.
Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

Go to view

How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with QNAP SS-EC1879U-SAS-RP. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

Go to view

How to recover data from a QNAP

SS-EC1879U-SAS-RP has 18 HDD slots, and it supports the following array types:

RAID 50;
RAID 60;
RAID 6;
RAID 5;
RAID 10;
RAID 0;
RAID 1;
JBOD;

NAS supports:

ZFS;
EXT4;
EXT3;
exFAT;
FAT32 (External Disk Only);
NTFS (External Disk Only);
HFS+ (External Disk Read Only);

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

Overwriting during the recovery process;
Additional data loss caused by bad sectors;
User errors.

To create a disk image, follow these steps:

Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.
Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

Where Are the User’s Files Actually Stored?

The QNAP SS-EC1879U-SAS-RP network-attached storage keeps QTS (QuTS hero) operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

RAID Recovery Software: Detailed Comparison

Product	Operating system	RAID controller support	Supported file systems	Virtual RAID controller support	Data recovery from damaged RAID	File preview
Hetman RAID Recovery	Windows, Linux, MacOS	Yes, over 100 controllers	FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS	Yes	Yes	Yes
DiskInternals RAID Recovery	Windows	Yes, over 10 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
R-Studio	Windows, Mac, Linux	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
UFS Explorer RAID Recovery	Windows, Mac, Linux	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
EaseUS Data Recovery	Windows	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
ReclaiMe Free RAID Recovery	Windows	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes

Feedback

We will be happy to answer your questions!

Comments (3)

Hetman Software: Data Recovery 9.08.2022 12:31 #

If you want to ask a question about data recovery, from NAS SS-EC1879U-SAS-RP, feel free to leave a comment!

Reply
Woodruff Fox 15.09.2023 01:51 #

Is it possible to recover data from a NAS QNAP SS-EC1879U-SAS-RP device if the device is experiencing firmware update or installation problems?

Reply
- Hetman Software 15.09.2023 03:10 #
  Yes, it is usually possible to recover data from a NAS QNAP SS-EC1879U-SAS-RP device even if it is experiencing firmware update or installation problems. Here are a few steps you can take to recover the data:
  Contact QNAP Support: Reach out to QNAP technical support to get guidance and assistance with the specific firmware update or installation problem you are facing. They may be able to provide you with a solution or workaround to resolve the issue without data loss.
  Check for Data Backup: If you have a backup of your data, either on another NAS or an external storage device, you can restore the data from the backup after resolving the firmware issue.
  Access the NAS via SSH: If the firmware update or installation problem prevents you from accessing the NAS through the usual web interface, you can try accessing it via SSH (Secure Shell). SSH allows you to access the command-line interface of the NAS and perform various operations, including data recovery.
  Use Data Recovery Software: If you are unable to resolve the firmware issue and cannot access the data through normal means, you can try using data recovery software. Connect the hard drives of the NAS to a computer and use specialized data recovery software to scan and recover the data from the drives.
  Consult Professional Data Recovery Services: If all else fails, and the data is critical and cannot be recovered using software solutions, you can consider consulting professional data recovery services. These services have specialized tools and expertise to recover data from faulty NAS devices.
  Remember, it is always recommended to have a backup of your data to avoid such situations.
  Reply

Post comment

Updated:
16.10.2025 8:53

Evaluations:
2
/
Rating:

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.

Questions and answers

What is SSH and how does it work in the context of network security and remote access?
SSH, which stands for Secure Shell, is a cryptographic network protocol that provides a secure way to access and manage remote systems over an unsecured network. It is widely used for secure remote administration of servers and for secure file transfers.
SSH works by establishing an encrypted connection between a client and a server. When a user initiates an SSH connection, the client and server perform a handshake to establish a secure channel. This involves negotiating encryption algorithms, authenticating the server, and optionally authenticating the client.
In terms of network security, SSH provides several key features:
1. Encryption: SSH encrypts all data transmitted between the client and server, including passwords, commands, and data transfers. This prevents eavesdropping and protects against data interception.
2. Authentication: SSH supports various authentication methods, including password-based authentication, public key authentication, and two-factor authentication. This ensures that only authorized users can access the remote system.
3. Integrity: SSH uses cryptographic algorithms to ensure the integrity of data. This means that any tampering or modification of data during transmission will be detected.
4. Port Forwarding: SSH allows for secure tunneling of network connections. This means that users can securely access services on a remote network as if they were directly connected to it.
Overall, SSH enhances network security by providing secure remote access and management capabilities. It protects sensitive information, prevents unauthorized access, and ensures the integrity of data transmitted over the network.
How does the NAS QNAP SS-EC1879U-SAS-RP utilize SSH protocol to enhance its functionality and security features?
The NAS QNAP SS-EC1879U-SAS-RP utilizes the SSH (Secure Shell) protocol to enhance its functionality and security features in several ways:
1. Secure Remote Access: SSH allows users to securely access the NAS remotely over the network. By encrypting the communication between the client and the NAS, SSH ensures that sensitive data, such as login credentials and file transfers, are protected from eavesdropping and unauthorized access.
2. Secure File Transfers: SSH supports secure file transfers using protocols like SFTP (SSH File Transfer Protocol) and SCP (Secure Copy). These protocols encrypt the data during transit, preventing any tampering or interception of files being transferred to or from the NAS.
3. Secure Shell Environment: SSH provides a secure shell environment that allows users to execute commands on the NAS remotely. This functionality enables administrators to manage and configure the NAS without physically being present at the device, enhancing convenience and accessibility while maintaining security.
4. Authentication and Encryption: SSH utilizes public-key cryptography for authentication, ensuring that only authorized users can access the NAS. It also supports password-based authentication, but the use of public-key authentication is generally recommended for higher security. Additionally, SSH encrypts all communication between the client and the NAS, protecting the data from unauthorized access.
5. Tunneling and Port Forwarding: SSH allows users to create secure tunnels and forward ports between the client and the NAS. This feature is useful for accessing services hosted on the NAS securely, even if they are not directly accessible from outside the network. It ensures that the data transmitted through the tunnel remains encrypted and secure.
Overall, the utilization of SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP enhances both the functionality and security of the device by providing secure remote access, encrypted file transfers, secure shell environment, strong authentication, and encrypted communication.
Can you explain the specific benefits and advantages of using SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP for secure file transfers and remote administration?
Using the SSH (Secure Shell) protocol in the NAS QNAP SS-EC1879U-SAS-RP for secure file transfers and remote administration provides several benefits and advantages:
1. Secure Communication: SSH ensures secure communication between the client and the NAS device by encrypting the data transmitted over the network. This prevents unauthorized access and protects sensitive information from being intercepted.
2. Authentication: SSH uses public-key cryptography for authentication, which is more secure than traditional password-based authentication. This ensures that only authorized users can access the NAS device remotely.
3. Secure File Transfers: SSH protocol supports secure file transfers using protocols like SFTP (SSH File Transfer Protocol) or SCP (Secure Copy). These protocols encrypt the data during transit, ensuring the confidentiality and integrity of the transferred files.
4. Remote Administration: SSH provides a secure way to remotely administer the NAS device. It allows administrators to securely access the command-line interface (CLI) or execute remote commands on the NAS device. This enables efficient management and configuration of the device from anywhere in the world.
5. Portability: SSH is a widely supported protocol and available on various operating systems, making it a versatile choice for secure remote administration and file transfers. It allows users to connect to the NAS device from different platforms and devices.
6. Firewall-Friendly: SSH protocol typically uses port 22 for communication, which is commonly allowed through firewalls. This ensures that SSH connections can be established even when other ports are blocked, simplifying remote access to the NAS device.
7. Two-Factor Authentication (2FA): QNAP NAS devices often support two-factor authentication for SSH connections. This adds an extra layer of security by requiring users to provide a second form of authentication, such as a verification code from a mobile app or a physical token.
By leveraging the SSH protocol in the NAS QNAP SS-EC1879U-SAS-RP, users can enjoy secure and encrypted file transfers, robust remote administration capabilities, and enhanced protection against unauthorized access.