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      Setting up rDNS (PTR) on Cherry Servers: Step-by-step guide

      Learn how to configure rDNS (PTR) records on Cherry Servers to enhance email deliverability, improve network diagnostics, and ensure your server’s IP address is correctly mapped to your domain name.

      Reverse DNS (rDNS) or PTR records are essential for verifying the authenticity of your server and enhancing its reliability across various services. This guide provides a detailed, step-by-step process for setting up rDNS (PTR) on Cherry Servers.

      Key Points to Consider:

      • This guide applies to all Cherry Servers, including virtual and bare metal servers.
      • Setting up rDNS (PTR) helps map your IP address back to your domain name, which is crucial for multiple internet services, not just email.

      Step-by-Step Instructions

      Step 1: Log in to Cherry Servers Client Portal

      1. Open a web browser.
      2. Navigate to the Cherry Servers client portal login page.
      3. Enter your username and password to log in.

      Step 2: Select Your Server

      1. In the dashboard, find and select the server you want to manage.
      2. Click on the server to open its details page.

      Step 3: Access the Server's Network Management

      1. On the left side of your client portal, click "Management IPs" or "Floating IPs" depending on your configuration (see Fig. 1).

        Fig. 1. Access the "Management IPs" or "Floating IPs" option in the Cherry Servers client portal.

      Step 4: Edit the IP Address Settings

      1. In the "Management IPs" or "Floating IPs" section, locate the box containing your IP address.
      2. Click on the gear icon (see Fig. 2).

        Fig. 2. Click on the gear icon to edit the IP address settings.
      3. From the drop-down menu, select "Edit" (see Fig. 3).

        Fig. 3. Select the "Edit" option from the drop-down menu.

      Step 5: Enter the rDNS (PTR) Record

      1. A new window will appear, allowing you to edit the IP address settings.
      2. In the "PTR record" field, enter your domain name (rDNS) (see Fig. 4).

        Fig. 4. Enter the domain name into the PTR record field.
      3. Ensure the domain name is correctly entered to avoid any resolution issues.

      Step 6: Update the PTR Record

      1. After entering your domain name, click on the "Update" button to save the changes (see Fig. 5).

        Fig. 5. Click the "Update" button to save the PTR record.
      2. After pressing "Update" you will see a message at the top of your client portal indicating that the IP address has been successfully updated (see Fig. 6).

        Fig. 6. IP address successfully updated message.
      3. Wait for a few minutes to allow the changes to propagate.

      Step 7: Verify the PTR Record

      1. After updating the PTR record, it's crucial to verify that the record has been set correctly.

      2. You can use online tools like "MXToolbox" or the "dig" command in the terminal to verify the PTR record.

        $ dig -x your_server_ip
      3. The output should display your domain name associated with the IP address, confirming that the PTR record is correctly set.

      Summary

      Following these steps, you can successfully set the rDNS (PTR) record on your Cherry Servers. Properly configured PTR records improve the reliability of your server’s email delivery and overall internet presence.