How to add a CNAME record to use a custom verify domain
By default, your product verification page is hosted at verify.qrs.com.vn. With the custom domain feature, you can use your own domain (e.g., verify.example.com) to increase trust and brand recognition.
Prerequisites
Before you start, you need:
Log in to your DNS management panel
Go to your domain registrar's DNS management page (Cloudflare, GoDaddy, Namecheap, etc.). Look for DNS records management or Zone Editor.
Add a CNAME record
Create a new CNAME record with the following details:
DNS record reference table for custom domain
| Field | Value | Notes |
|---|---|---|
| Type | CNAME | |
| Name | verify | Or the subdomain you want to use (verify.example.com) |
| Target / Value | custom.qrs.com.vn | This is the CNAME target from QRS |
| TTL | 3600 (or Auto) | Default value is acceptable |
Example CNAME record (replace example.com with your domain)
verify.example.com. IN CNAME custom.qrs.com.vn.Note about existing DNS records
If the subdomain you chose already has an A or CNAME record, you need to delete the old record before adding the new one. A subdomain can only have one CNAME record.
Verify in CMS
Go back to the QRS CMS, navigate to "Domains" and click the verify button. The system will check your CNAME record.
Wait for SSL certificate provisioning
After the CNAME is verified, the system automatically provisions an SSL certificate. This usually takes 5-15 minutes, but in some cases can take up to 24 hours.
Troubleshooting
| Issue | Cause | Solution |
|---|---|---|
| CNAME verification failed | DNS record not yet updated | Wait 5-10 minutes for DNS propagation, then retry. Use dig or nslookup to check. |
| Page not loading after verification | SSL certificate not yet issued | Check SSL status in CMS. If still pending, wait another 10-15 minutes. |
| ERR_TOO_MANY_REDIRECTS error | Cloudflare proxy feature is enabled | Disable proxy (switch to DNS only / grey cloud) for this CNAME record. |
| CNAME record being overwritten | An A record with the same name exists | Delete the old A record for that subdomain, keep only the CNAME record. |
Commands to verify CNAME record
# Check CNAME record on macOS/Linux
dig verify.example.com CNAME
# Check on Windows
nslookup -type=CNAME verify.example.comNeed more help?
If you encounter an issue not listed above, contact our support team via the Contact page or email support@qrs.com.vn.
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