rjuip.com DDNS – FAQ

Dynamic DNS allows you to access your device or server even when your internet provider changes your public IP address. Instead of using a fixed IP address, you use a domain name that automatically updates to your latest IP.

DDNS is useful if you want to:

• Access home servers remotely
• Access CCTV cameras
• Host applications behind dynamic IP
• Access NAS devices

Your device periodically sends its IP address to our update API. Our system updates your domain DNS record automatically.

Click on the Create an account button on the login page and fill in your details. After registration, you can immediately start using the free plan.

Yes, we offer a free plan with limited domains and basic features. You can upgrade anytime to access more domains and advanced features.

Free accounts are valid for a lifetime (as per current policy). However, you must log in at least once every 30 days to keep your account active and ensure uninterrupted service.

If you do not log in for 30 days, your free account may become inactive. You can simply log in again to reactivate your account and resume services.

Go to Dashboard → Change Plan, select your desired plan, and complete the payment. Your plan will be activated immediately after successful payment.

Yes, you can upgrade anytime. The remaining validity of your current plan may be adjusted based on upgrade rules.

If your plan expires:

• Your account may be downgraded to the free plan
• Extra domains or premium features may stop working
• You can renew anytime to restore full functionality

Your domains may continue to exist, but updates and advanced features may be restricted depending on your plan.

Payments are generally non-refundable. However, in special cases, you may contact support for review.

Yes. Once configured, your device uses a token or credentials to update your IP automatically. No manual login is required as long as your account remains active.

Yes. We use secure authentication methods, HTTPS encryption, and access controls to protect your account and domains.

Plan	Domains
Free Basic	2
Paid Basic	5
Pro	10
Enterprise	50

Free plan users can use: Paid plan users can use private domains such as:

Yes. Domains can be added, updated, or deleted anytime from the Manage Domains page.

You can use your own domain (e.g., camera.mydomain.com) by linking it to our system. Follow these steps:

1. Go to Dashboard → Manage Domains and click Add Domain.
2. Enter your desired private subdomain (e.g., camera.mydomain.com).
3. After adding, the system will generate a unique primary subdomain (example: abcdefg.rjuip.com).
4. Go to your domain DNS settings and create a CNAME record:
   Host: camera Type: CNAME Value: abcdefg.rjuip.com
5. Wait for DNS propagation (usually a few minutes, up to 24 hours).
6. Once done, your private subdomain will start working with DDNS updates.

Check the following:

• CNAME record is correctly pointing to your assigned primary subdomain
• No spelling mistakes in hostname
• DNS propagation is complete (can take up to 24 hours)
• Your domain is active in the dashboard
• Your device is sending DDNS updates correctly

Example command: Copy Example using curl: Copy

Recommended interval is every 5 minutes. If the IP has not changed the server returns nochg.

The DNS record will continue pointing to the last known IP until the device sends another update.

Security features include:

• HTTPS encryption
• Token authentication
• Rate limiting
• Abuse protection

20 failed attempts within 15 minutes will trigger an IP block for 1 hour.

Each domain is assigned a unique token used to securely update its IP address.

• The token is generated when you create or add a domain
• It is shown only once at the time of generation
• Anyone with this token can update your domain's IP address

If you forget or lose your token, you can easily generate a new one:

• Go to Dashboard → Manage Domains
• Select your domain and click Regenerate Token

Yes. If you regenerate your token, you must update it on all devices, routers, or scripts that use it for DDNS updates. Otherwise, those devices will fail to update your IP address.

Open the following URL in a browser: Copy Expected response: