rdnsgen v1 - RDNS Record Automation Tool

A simple, secure, browser-based PHP tool to convert bulk RDNS entries into provider-compatible formats. This tool is optimized for web hosting professionals and sysadmins who regularly manage reverse DNS setups.

Features

• ✏️ Accepts input via text area or .txt file upload (max 2 KB).
• 🧠 Auto-detects formats like:
  • hostname,IP
  • IP PTR hostname
  • Raw combinations without delimiter
• 🧹 Cleans up and corrects formats automatically.
• 📄 Previews the processed RDNS entries.
• 📥 Generates downloadable .txt file with a dynamic name:
  rdns_<IP-subnet>_<YYYYMMDD_HHMMSS>.txt
• ✅ Ensures hostnames end with a dot (.).
• 🔐 Validates file type (text/plain) and restricts file size.

Input Formats Supported

You can paste or upload RDNS records in any of these formats:

int3rnet.net,192.168.100.101 192.168.100.101 PTR int3rnet.net int3rnet.net192.168.100.101

The tool intelligently parses and formats them into:

101 PTR int3rnet.net.

Security Measures

• Accepts only .txt files with MIME type text/plain
• Upload size limited to 2 KB
• No files are saved on the server
• Processed data is passed via POST and generated dynamically

How To Use

1. Upload a .txt file with RDNS records OR paste your RDNS entries into the textarea.
2. Click Process Records.
3. Review the formatted output in the preview section.
4. Click Download Processed File to download the generated .txt.

Files

• rdns.php — Main interface and processor.
• download.php — Handles the download with proper headers.

Installation

1. Upload the files to your PHP-enabled web server.
2. Access rdns.php via your browser.
3. Done!

Example Output

If you input:

web01.example.com,203.0.113.45

The generated file will contain:

45 PTR web01.example.com.

And the download filename will look like:

rdns_203.0.113_20250330_231509.txt

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🛡️ License

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for details.

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Author & Credits

Maintained & Developed by Dhruval Joshi from HostingSpell
GitHub Profile: @thekugelblitz | This was created by Dhruval Joshi to use at HostingSpell and optimized with the help of GPT4 later.

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If you want to contribute, feel free to fork and submit a PR! 🚀

Pull requests and contributions are welcome!

🛠 Created with ❤️ by Dhruval for smart RDNS management.

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