QuTScloud

QuTScloud is the operating system for QNAP Cloud NAS virtual appliances. With the possibility of on-premises and cloud deployment, QuTScloud enables optimized cloud data usage and flexible resource allocation at a predictable monthly cost.

System
Applications

QES

QES is the operating system for dual-controller QNAP NAS models. With FreeBSD and ZFS, QES is flash-optimized, capable of driving outstanding performance for all-flash storage arrays.

System
Product
Resources

QNE Network

QNE Network is the operating system for QuCPE, QNAP's universal customer premises equipment series. Run virtual network functions, freely configure software-defined networks, and enjoy benefits such as lowered costs and reduced management efforts.

System
Applications

QSS

QNAP Switch System (QSS) is the configuration interface for QNAP's managed switch series. Enable management functions such as link aggregation, VLAN, and RSTP, to take care of your network topology with ease.

System

QuRouter

QNAP’s QuRouter OS simplifies managing high-speed and high-coverage LAN/WAN. With NAT, VPN, security, and QuWAN SD-WAN, network management is made easier and remote connections more secure.

System
Applications

QVR Surveillancee

QVR Surveillance is QNAP’s network video recorder software solution. It offers subscription-based QVR Elite and perpetual QVR Pro, and can be used with a series of apps, such as face recognition and door access control for a wider range of scenarios.

System
Applications
Resources

QVR Face

QVR Face is a smart facial recognition solution featuring real-time live streaming video analytics from connected cameras. It can be integrated into multiple scenarios to provide intelligent attendance management, door access control management, VIP welcome systems and smart retail services.

System
Applications
Resources

KoiMeeter

QNAP smart video solutions provides integrated intelligent packages such as video conferencing and smart retail, boosting productivity for individuals and businesses.

Video Conferencing
Smart Retail

HS-251 Specification

CPU Intel® Celeron® 2.41GHz dual-core processor (burst up to 2.58GHz)
DRAM HS-251-2G: 2GB DDR3L RAM
HS-251: 1GB DDR3L RAM
Flash Memory 512MB DOM
Hard Disk Drive 2 x 3.5” or 2.5” SSD or NAS Hard Drives
NOTE:
  1. The system is shipped without HDD.
  2. For the HDD compatibility list, please visit www.qnap.com/compatibility
Hard Disk Tray 2 x Hot-swappable tray
LAN Port 2 x Gigabit RJ-45 Ethernet port
LED Indicators Status, LAN
USB 2 x USB 3.2 Gen 1 port
2 x USB 2.0 port
Support USB printer, pen drive, and USB UPS etc.
HDMI™ 1
Buttons Power/Status, reset
Alarm Buzzer System warning
IR Receiver MCE-compatible
Form Factor Compact
Dimensions 41.3 (H) x 302 (W) x 220 (D) mm
1.62 (H) x 11.89 (W) x 8.66 (D) inch
Weight Net: 1.56 kg / 3.44 lb
Gross: 2.62 kg / 5.78 lb
Power Consumption (W) HDD standby: 8.96W
In operation:15.64W
(with 2 x 3TB WD NAS HDD installed)
Temperature 0-40˚C
Humidity 5~95% RH non-condensing, wet bulb: 27˚C
Power Supply External Power Adapter, 60W, 100-240V
Secure Design Kensington security slot for theft prevention
Note: Use only QNAP memory modules to maintain system performance and stability. For NAS devices with more than one memory slot, use QNAP modules with identical specifications and refer to the hardware user manual to install compatible QNAP memory modules.
Warning: Using unsupported modules may degrade performance, cause errors, or prevent the operating system from starting.
QNAP reserves the right to replace partial parts or accessories if the original is no longer available from its manufacturer/supplier. Any replacement would be fully tested and verified to meet strict compatibility and stability guidelines and will deliver identical performance to the original.
The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
Product images are for illustrative purposes only and may differ from the actual product. Due to differences in monitors, colors of products may also appear different to those shown on the site.
Designs and specifications are subject to change without notice.
 
Operating System
QTS 4.1 (embedded Linux)
Storage Management
  • Online Volume Expansion
  • Single Disk, JBOD, RAID 0, 1
  • Online RAID Capacity Expansion
  • Online RAID Level Migration
  • Bad block scan and hard drive S.M.A.R.T.
  • Bad block recovery
  • RAID recovery
  • Bitmap support
Supported Client OS
  1. Apple Mac OS 10.7 or later
  2. Linux and UNIX
  3. Microsoft Windows 7, 8, and 10
  4. Microsoft Windows Server 2003, 2008 R2, 2012, 2012 R2 and 2016
Power Management
  • Wake on LAN
  • Internal hard drive standby mode
  • Scheduled power on/off
  • Automatic power on after power recovery
  • USB andnetwork UPS support with SNMP management
  • System sleep mode (S3)
Supported Browsers
  • Chrome, IE 10+, Firefox, Safari
Access Right Management
  • Batch users creation
  • Import/export users
  • User quota management
  • Local user access control for CIFS, AFP, FTP, and WebDAV
  • Application access control for Photo Station, Music Station, Video Station, and Multimedia Station
  • Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
Multilingual Support
  • Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
myQNAPcloud Service
  • Private cloud storage and sharing with myQNAPcloud id (qid)
  • Free host name registration (DDNS)
  • Auto router (via UPnP) configuration
  • Web-based file manager with HTTPS 2048-bit encryption
  • myQNAPcloud Link for remote access without complicated router setup
  • myQNAPcloud connect for easy VPN connection (WindowsVPN utility)
File System
  • Internal hard drive: EXT4
  • External hard drive: EXT4, EXT3, NTFS, FAT32, HFS+
Qsync
  • Syncs files among multiple devices with SSL support
  • Selective synchronization for syncing specific folders only
  • Share team folder as a file center for team collaboration
  • Shares files by links via e-mail
  • Policy settings for conflicted files and file type filter support
  • Version control: up to 64 versions.
  • Incremental synchronization for HDD space saving
  • Supports Windows&MacOS
Networking
  • TCP/IP: IPv4 & IPv6
  • Dual Gigabit NICs with jumbo frame (failover, multi-IP settings, port trunking/NIC teaming )
  • Service binding based on network interfaces
  • Proxy client, proxy server
  • DHCP client, DHCP server
  • Protocols: CIFS/SMB,AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
  • UPnP& Bonjour discovery
  • USB Wi-Fi adapter support
Web Administration
  • Multi-window, multi-tasking based system management
  • Personalized desktop
  • Smart toolbar and dashboard for neat display on system status
  • Login screen with personalized photo-wall style •Smart fan control
  • Dynamic DNS (DDNS)
  • SNMP (v2 & v3)
  • Resource monitor
  • Network Recycle Bin for File Deletion via CIFS/SMB, AFP and File Station
    - Automatic Cleanup
    - File Type Filter
  • Comprehensive logs (events & connection)
  • Syslog client/server
  • System settings backup and restore
  • Restore to factory default
  • Mobile app: Qmanager for remote system monitoring & management
Security
  • Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
  • CIFS host access control for shared folders
  • FIPS 140-2 validated AES 256-bit volume-based data encryption*
  • AES 256-bit external drive encryption*
  • Importable SSL certificate
  • Instant alert via E-mail, SMS, and beep
File Server
  • File Sharing across Windows, Mac, and Linux/UNIX
  • Windows ACL
  • Advanced folder permission for CIFS/SMB, AFP, FTP
  • Shared folder aggregation (CIFS/SMB)
Powerful All-in-one server
FTP Server
  • FTP over SSL/TLS (Explicit)
  • FXP supported
  • Passive ftp port range control
AirPlay
  • Streams videos, photos and music from NAS to Apple TV via Qfile or Media Streaming add-on.
File Station
  • Supports ISO Mounting (Up to 256 ISO Files)
  • Support thumbnail display of multimedia files
  • Supported share download link and upload link
  • Drag-n-drop Files via Chrome and Firefox Browsers
  • Photo, music, and video preview and playback withhardware acceleratedtranscoding
  • File Compression (ZIP or 7z)
Signage Station
  • Support dynamic content includes video, image,music, and text message
  • Support multi users collaboration
  • Support searching keywords,
  • Support email and social network sharing
  • Support design software - iArtist Lite
  • Support account authority management
  • Support various browser playback ( Chrome, Firefox, IE, Safari)
  • Support most viewed, latest released and different categories content list
Transcode Management
  • Transcodevideo files to 240p, 360p, 480p, 720p and 1080p resolution
  • Automatic video transcoding for watched folders
  • Hardware accelerated transcoding support
Download Station
  • PC-less BT, FTP/FTPS, and HTTP/HTTPS download (up to 500 Tasks)
  • BT download with Magnet Link and PT support
  • Scheduled download and bandwidth control
  • RSS subscription and download (broadcatching)
  • Bulk download with wildcard settings
  • BT search
  • Proxy support for BT download
  • PC utility: Qget for downloads browsing and management
  • Mobile app: Qget for downloads browsing and management
Backup Station
  • Remote replication server (over rsync)
  • Real-time remote replication (RTRR) to another QNAPNAS or FTP server
  • Works as both RTRR server & client with bandwidth control
  • Real-time & scheduled backup
  • Encryption, compression, file filter, and transfer rate limitation
  • Encrypted replication between QNAPNASservers
  • Desktop backup with QNAPNetBakReplicator for Windows
  • Apple Time Machine backup support
  • Data backup to multiple external storage devices
  • Synchronizes with cloud storage: Amazon S3, ElephantDrive, Dropbox, and GoogleDrive
  • Third party backup software support: Veeam backup & replication, AcronisTrue Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.
HD Station
  • Playbacks videos, music, photos on tv with Kodi via hdmi output
  • Watch various online contents such as Flickr, Picasa, Shoutcast, etc.
  • Web browser
  • Supports USBU.S. keyboard and mouse
  • Supports QNAPQremote app and the official Kodi remote app

Note:
The playback and quality of some video files may be affected due to the current CPU and GPU's decoding capability.

Cloud Backup Station
  • Amazon S3
  • Amazon Glacier
  • Webdev-based cloud storage
  • Microsoft Azure
  • Open Stack
Surveillance Station
  • Supports over 2,100 ip cameras
  • Includes 2 free camera licenses, up to 24 camera channels via additional license purchase
  • Instant playback to check the recent event
  • Online editing to edit cameras when live view
  • Visual aid by e-map
  • Playback and speed control by shuttle bar
  • Video preview on playback timeline
  • Intelligent video analytics (iva) for advanced video search
  • Surveillance client for Mac
  • Mobile surveillance app: vmobile (iOS and Android)
  • Mobile recording app: vcam (iOS and Android)
Print Server
  • Maxnumber of printers: 3
  • Print job display and management
  • IP-based and domain name-based privilege control
Notes Station
  • Take notes of everything on your private cloud
  • Collaborate notes with multi users
  • Support graphical editor for note editing
  • Integrate with NAS file system: insert attachment or image from NAS file system
  • Support event calendar and to-do list
  • Support image editor: a easy way to highlight the focus in your image
  • Support note publishing with a single link
  • Support key word search
  • Provide Chrome Extension: Notes Station Clipper
    • Clip web page contentto your note
Photo Station
  • Show photos in thumbnails, list, timeline, or folder view
  • Supports virtual/smart album
  • Validity control for sharing albums
  • Tags photos with text, color, and rating
  • Slideshows with background music and different transition effects
  • Animated thumbnails for videos
  • Geotags photos and display them on Google maps
  • Shares slideshows link to social websites or through email
  • Supports Facebook friends login
  • Supports modification on photo taken date
VPN Server
  • Secure remote access: PPTP &OpenVPN VPN services
  • Max number of clients: 30
Music Station
  • Plays or Shares Music Collections with Web Browser
  • Automatic Classification via Media Library
  • Supported audio format: AIFF, APE, FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM),WMA, WMA PRO, WMA VBR
    * DRM encryption format is not supported.
  • Internet Radio (MP3)
  • Up to 8 Music Alarms
Domain Authentication Integration
  • Microsoft Active Directory (AD)
  • LDAP server, LDAP client
  • Domain users login via CIFS/SMB, AFP, FTP, and File Station
App Center
  • More than 100 official and community software add-ons (ex: Dropbox, Google Cloud Storage Sync, McAfee, WordPress, HappyGet II, etc.)
Video Station
  • Show photos in thumbnails, list, timeline, or folder view
  • Supports virtual/smart collection
  • Validity control for sharing collections
  • Tags videos with text, color, and rating
  • Animated thumbnails for videos
  • Shares video collection link to social websites or through email
  • Sorting videos automatically into defined classifications
  • Display movie information from IMDB
Virtualization Station
  • Support one Virtual Machine (VM) creating to run an operating system such asWindows, Linux, Unix.
  • VM import from Virtual Appliances
  • VM export into a virtual appliance in OVF / QVM format
  • VM clone
  • VM snapshot
  • HTML5 based shared remote console
DLNA Server
  • Supports DLNA/UPnP TVs and Players such as PlayStation 3 and Xbox 360
  • Supported audio format: AIFF, APE, DSD (DSF, DFF), FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM), WMA, WMA PRO, WMA VBR
    *DRM encryption format is not supported.
  • Support CUE indexing file for APE, FLAC audio format.
  • Video and Audio On-the-fly Transcoding
Mobile App
  • Qfile: iOS, Android Phone, window phone
  • Qfile HD: iPad version
  • Qmanager: iOS, Android Phone
  • Qmusic: iOS, Android Phone
  • Qremote: iOS, Android Phone
  • Qget: Android Phone
  • Vmobile: iOS, iPad, Android Phone

(1). Not all services are supported.
*The data encryption functions may not available in accordance with the legislative restrictions of some countries.

Design and specifications are subject to change without notice.

 
HS-251 Ethernet cable x 2 Quick Installation Guide
Power cord Flat head screw x 6 (for 2.5" HDD) Flat head screw x 8 (for 3.5" HDD)
   
Adaptor    

Optional Accessories

Bundled accessories delivered together with the product such as expansion cards, power adapter, and accessories are covered with one-year warranty.

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