Overview
This Knowledge Base explains how rDNS (Reverse DNS) works on CloudPe, how it is automatically created, and clarifies common doubts faced by customers and internal teams.
CloudPe follows a fully automated rDNS creation process. Customers do not need to manually add or manage rDNS entries after creating a Virtual Machine (VM).
What is rDNS?
Reverse DNS (rDNS) maps an IP address back to a hostname.
- Forward DNS: hostname → IP address
- Reverse DNS (rDNS): IP address → hostname
rDNS is commonly used for:
- Email server reputation and spam checks
- Network identification
- Compliance with hosting and email best practices
How rDNS Works in CloudPe
High-Level Flow
- Client creates a VM from the CloudPe CMP.
- Client provides or updates the hostname for the VM in the CMP.
- CloudPe backend rDNS automation runs every 1 hour.
- The automation reads VM IP and hostname details from the CMP.
- rDNS entry is automatically created in DNS.
👉 No manual action is required from the client or support team.
rDNS Creation Schedule
- rDNS is not created instantly.
- The backend automation runs on an hourly interval.
- rDNS entries are usually visible within 1 hour after VM creation or hostname update.
⚠️ If rDNS is checked immediately after VM creation, it may not appear yet. This is expected behavior.
Backend Automation Details
- CloudPe runs an automated rDNS creation in the backend.
- Scans newly created or updated VMs
- Fetches IP address and hostname from the CMP
- Automatically adds or updates rDNS records in DNS
Key Points
- Automation runs hourly
- Fully automated
- Prevents manual errors
- Ensures consistency across the platform
Do Clients Need to Add rDNS Manually?
No.
CloudPe automatically handles rDNS creation.
Clients should NOT:
- Raise requests for manual rDNS creation
- Try to configure rDNS outside CloudPe
- Expect instant rDNS creation
Clients SHOULD:
- Ensure the correct hostname is set in the CloudPe CMP
- Wait up to 1 hour for rDNS propagation
Common Questions & Clarifications
Q1: rDNS is not visible immediately after VM creation
Answer: This is expected. rDNS is created by an hourly backend automation. Please wait up to 1 hour.
Q2: Can support add rDNS manually?
Answer: No manual addition is required or recommended. The automated process will handle it.
Q3: What if the hostname is changed?
Answer: The updated hostname will be picked up by the next hourly automation run and rDNS will be updated automatically.