General DSM Specifications

Networking protocols

SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, and VPN (PPTP, OpenVPN™, L2TP)

File systems

• Internal: Btrfs, ext4

• External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT

Supported RAID types

Synology RAID F1, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10

Storage management

• Maximum single volume size: 108 TB/200 TB8

• Maximum number of system snapshots: 65,5369

• Maximum number of internal volumes: 256

SSD cache

• Read/write cache support

• 2.5" SATA SSD support

File sharing capabilities

• Maximum local user accounts: 16,000

• Maximum local groups: 512

• Maximum shared folders: 512

• Maximum concurrent SMB/NFS/AFP/FTP connections: 2,000 (8,000 with RAM expansion)10

Privileges

Windows® Access Control List (ACL) and application privileges

Directory services

Connects with Windows® AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their

existing credentials

Virtualization

VMware® vSphere™, Microsoft® Hyper-V®, Citrix® XenServer™, OpenStack, and Kubernetes

Security

Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt

support, and HTTPS (customizable cipher suite)

Supported browsers

Google Chrome®, Firefox®, Microsoft Edge®, Safari® 13 and later, and Safari (iOS 13.0 and later) on iPad, Chrome (Android™

11.0 and later) on tablets

Interface languages

English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, Русский, Polski, Magyar,

Português do Brasil, Português Europeu, Türkçe, Český,

Packages and Applications

File Server & Synchronization

Drive

Synchronizes files across Windows®, macOS®, Linux®, Android™ and iOS. The built-in cross-platform portal allows access to

data anytime and anywhere

• Maximum number of hosted files: 50,000,000

• Maximum number of concurrent connections for PC clients: 900

File Station

Provides virtual drives, remote folders, Windows® ACL editor, compression/extraction of archived files, bandwidth control for

specific users/groups, creation of sharing links, and transfer logs

Hybrid Share5

Efficiently synchronizes files across sites by keeping shared data on Synology C2 Storage and streaming files to Synology NAS

worldwide on request. Frequently requested files are cached at each site for low-latency access

FTP Server

Supports bandwidth control for TCP connections, custom FTP passive port ranges, anonymous FTP, FTP over TLS/SSL and

SFTP protocols, network booting with TFTP and PXE support, and transfer logs

Presto File Server11

Enables high-speed data transfer over WAN through the exclusive SITA technology between Synology NAS and desktop

platforms

Cloud Sync

Offers one or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, Backblaze B2, Baidu

Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk, Microsoft OneDrive, OpenStack Swift-compatible

storage, Tencent COS, WebDAV servers and Yandex Disk

Universal Search

Search through files, metadata, and more on your NAS. Integration with Windows Search and macOS Spotlight makes it easy

to find files

Migration Assistant

Migrates data, system setting, and applications seamlessly from one Synology NAS to another to ensure maximum service

availability

SAN Storage & Virtualization

SAN Manager

• Maximum number of iSCSI targets: 256

• Maximum number of LUNs: 512

• LUN Clone/Snapshot, Windows ODX support

Virtual Machine Manager12

Supports running Windows®, Linux®, and Virtual DSM-based virtual machines on Synology NAS

Data Protection & Backup Solution

Hyper Backup

Supports local backup, network backup, and data backup to other servers and public clouds, including C2 Storage

Backup tools

• DSM configuration backup, macOS® Time Machine® support, Synology Drive Client desktop application

• Shared folder sync supports a maximum of 32 tasks

DATASHEET | FlashStation FS2500