Custom Hostnames
Publish a NAS, router, dashboard or internal web service through a stable HTTPS hostname.
How it works →MANAGED REMOTE ACCESSReach every device.
Reach every device.
Open no ports.
Securely reach an OpenWrt router, NAS, server or desktop through a stable hostname and an outbound encrypted tunnel.
NAS51WEB
Vendor-hosted control planeManaged relay nodesUnified account tokenDynamic DNS
CLIENT SUPPORTWorks across platforms
OpOpenWrtiSiStoreOSDoDockerSySynologyQNQNAPLiLinuxmamacOSWiWindowsUnUnraidRoRouters
REMOTE ACCESS TOOLKITMore than a tunnel.
More than a tunnel.
Everything in one console.
Hostnames, tunnels, desktops, terminals and file access are managed under one account.
RDP and VNC
Reach Windows and Linux desktops from a browser without exposing their native ports to the Internet.
How it works →Web SSH
Open a managed SSH workspace from anywhere and keep remote access under one account.
How it works →File Access
Connect to WebDAV, Samba or SFTP services while the actual files remain on your own device.
How it works →Dynamic DNS
The Agent detects public IPv4 and IPv6 changes and refreshes the device DNS record automatically.
How it works →Managed Relay Network
The commercial 51DDNS service operates the control plane and relay nodes used by enrolled devices.
How it works →GET STARTEDOnline in
Online in
three steps.
The device initiates the connection. No inbound firewall rule or public IPv4 address is required.
- 01
Create an account
Register in the console and copy your unified account token.
- 02
Install the Agent
Follow the OpenWrt guide or choose another package on the downloads page.
- 03
Publish a service
Add a hostname, SSH application, file endpoint or remote desktop in the console.
$ service 51ddns-agent start
✓ device authenticated✓ configuration synchronized✓ tunnel connected to relay✓ public endpoint readyBUILT FOR REAL DEVICESOne platform.
One platform.
Many remote workflows.
Home and NAS
Reach Synology, QNAP, Unraid and home services without publishing management ports.
- File access
- Media services
- Stable hostnames
Remote Operations
Manage routers, servers and customer environments with SSH, browser desktops and audit records.
- Device groups
- Remote shell
- Access records
OpenWrt Devices
Install the Agent from LuCI or a signed package and manage the router from the 51DDNS console.
- LuCI interface
- Unified token
- Automatic reconnect
OEM & CHANNEL PARTNERSShip 51DDNS
Ship 51DDNS
with your device.
OpenWrt vendors, firmware teams and integrators can preinstall signed packages, attribute activations and receive configurable commissions on eligible payments.
Discuss an OEM integration →- 01Safe preinstallationNo user token is embedded in factory firmware.
- 02Activation attributionThe customer links the device after receiving it.
- 03Commission recordsEligible payments and refunds remain traceable.
- 04Commercial supportPackage, rollout and integration assistance.
SIMPLE PRICINGClear pricing
Clear pricing
for every device bundle.
Device counts, exact durations, whole-bundle prices and capabilities are read from the current product catalog.
Plans, prices and capabilities are synchronized with the console.
体验版-90天
Current plan configuration
CN¥0.00 CNY90 days · whole bundle
- 1 device per bundle (dedicated resources)
- 2 custom hostnames per device
- 2 routes / apps per device
- 1 Mbps bandwidth per device
- Real-device binding
- HTTP tunneling
- SSH
Standard
Current plan configuration
CN¥9.90 CNY3 months (90 days) · whole bundle
- 10 devices per bundle (dedicated resources)
- 10 custom hostnames per device
- 10 routes / apps per device
- 4 Mbps bandwidth per device
- Real-device binding
- HTTP tunneling
- HTTPS tunneling
- SSH
- Remote Desktop (RDP)
Advanced
Current plan configuration
CN¥29.00 CNY3 months (90 days) · whole bundle
- 30 devices per bundle (dedicated resources)
- 30 custom hostnames per device
- 30 routes / apps per device
- 8 Mbps bandwidth per device
- Real-device binding
- HTTP tunneling
- HTTPS tunneling
- SSH
- Remote Desktop (RDP)
Flagship
Current plan configuration
CN¥99.00 CNY3 months (90 days) · whole bundle
- 100 devices per bundle (dedicated resources)
- 100 custom hostnames per device
- 100 routes / apps per device
- 10 Mbps bandwidth per device
- Real-device binding
- HTTP tunneling
- HTTPS tunneling
- SSH
- Remote Desktop (RDP)
- VNC
- Web file manager
- Backup acceleration hostname
Prices cover all device authorizations for the selected period, not a monthly or per-device charge. Confirm the plan and period in the console before payment.
Need a bulk or custom plan?Contact sales →
TRUST AND SUPPORTFrequently asked
Frequently asked
questions.
Deployment, pricing, privacy and the managed-service trust boundary.
What does 51DDNS do?＋
51DDNS enrolls a device with an Agent, assigns stable access endpoints and creates outbound tunnels so internal services can be reached without inbound port forwarding.
Is 51DDNS self-hosted?＋
No. 51DDNS is a commercial vendor-hosted service. The control plane and relay infrastructure are operated by 51DDNS, while your Agent runs on your own device.
How is the service billed?＋
Each bundle issues the selected number of independent plan instances. Each instance authorizes one device with dedicated resources and supports reassignment under the configured rebind policy.
Where does my traffic go?＋
Control requests reach api.51ddns.com and tunnel traffic is relayed through 51DDNS infrastructure. Do not publish a service unless you accept this trust boundary.
Does 51DDNS store my NAS files?＋
No. File contents remain on your device. Connection metadata and the operational data needed to provide the managed service are processed by the platform.
How do I install it on OpenWrt?＋
Use the signed package or repository instructions in the English OpenWrt guide. The LuCI application provides token configuration and service status.
51DDNS SUPPORT
Contact support →Need help?
Include the device ID, approximate time and observed error when contacting support.