QNAP HS-251

HW

CPU Intel® Celeron® 2.41GHz dual-core processor (burst up to 2.58GHz) DRAM 1GB DDR3L RAM Flash Memory 512MB DOM Hard Disk Drive 2 × 3.5” or 2.5” SSD

• or NAS Hard Drives NOTE: The system is shipped without HDD. For the HDD
• compatibility list, please visit http://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 3.0 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 302(H) x 220(W) x 41.3(D) mm Weight Net: 1.56 kg / Gross: 2.62 kg
• Power Consumption (W) HDD standby: 8.96W In operation:15.64W (with 2 × 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

SW

Operating System QTS 4.1 (embedded Linux)

Supported Client OS

Windows XP and Windows Server 2003 onward, Apple Mac OS X onward, Linux & UNIX Supported Browsers

Chrome, IE 10 onward, Firefox, Safari Multilingual Support

Chinese (Traditional & Simpli?ed), Czech, Danish, Dutch, English,

Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian,

Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish

File System

Internal hard drive: EXT4 External hard drive: EXT4, EXT3, NTFS, FAT32, HFS+

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 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 certi?cate Instant alert via E-mail, SMS, and beep 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 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) 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 myQNAPcloud

Service

Private cloud storage and sharing with myQNAPcloud id (qid) Free host name registration (DDNS) Auto router (via UPnP) con?guration Web-based file manager with HTTPS 2048-bit encryption Cloudlink for remote access without complicated router setup myQNAPcloud connect for easy VPN connection (WindowsVPN utility) 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 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 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 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) Transcode

Management

Transcodevideo files to 240p, 360p, 480p, 720p and 1080p resolution Automatic video transcoding for watched folders Hardware accelerated transcoding support

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, Symform, Dropbox, and
• GoogleDrive Third party backup software support: Veeam backup & replication,

AcronisTrue Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.

Cloud Backup Station

Amazon S3 Amazon Glacier Webdev-based cloud storage Microsoft Azure Open

Stack Print Server

Maxnumber of printers: 3 Print job display and management IP-based and domain name-based privilege control 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 Music

Station

Plays or shares music collections with web browser Automatic classification via Media Library Internet radio streaming (MP3) Up to 8 music alarms Mobile app: Qmusic for music playing and management iTunes Server

Audio and Video Sharing for Windows& Mac iTunes Video Station

Show photos in thumbnails, list, timeline, or folder view Supports virtual/smart collection Validity control for sharing collections Tags videos w