---
title: 'Troubleshooting FTP/UDP uploads'
description: 'How to troubleshoot FTP and UDP uploads through the Pull add-on, including dropped connections, misconfigured pull profiles and FTP credentials.'
url: https://www.medialab.co/support/troubleshooting/integration/troubleshooting-ftp-udp-uploads
---

# Troubleshooting FTP/UDP uploads

MediaLab supports FTP and UDP uploads through the Pull add-on. These methods are reliable for large or automated transfers, but issues can occur due to network or profile settings.

### Control Connection Closing Due to Firewall/Router

**Error:** _“Could not write to transfer socket: EPIPE”_

- FTP uses both a control connection and a data connection. Some firewalls close idle control connections during large transfers, causing failures.
- **Solution:** Try a different FTP client that handles idle connections better.
- Ask your IT department to adjust firewall/router rules to keep control connections open.

### Upload Failures From Misconfigured Pull Profiles

- Files may not appear in the expected folder if the pull profile is not set correctly.
- **Solution:** Verify the target folder is correctly set in **Settings → Cloud Storage → Pull profiles**.
- Use the correct **Folder ID** when creating FTP subdirectories.

### Regenerating FTP Credentials

- If authentication fails, your FTP password may be expired or incorrect.
- **Solution:** Go to **Settings → FTP Upload**, re-activate the profile, and generate new credentials.
- Confirm the correct server (default `ftp.medialab.app`) and port (default `21`).

### Chunked Uploads for Unstable Connections

- Uploads can fail if your connection is slow or unstable.
- **Solution:** Enable **chunked uploads** in your user preferences to split files into smaller parts.
- Copy files from NAS to your local machine before uploading.
- Use FTP instead of the web uploader for very large files.

### Best Practices

- Use FTP/UDP for large or automated transfers, and the web uploader for small/manual uploads.
- Test uploads with small files before scaling to bigger transfers.
- Keep FTP credentials secure; they cannot be retrieved later, only regenerated.
- If frequent issues occur, consider using **ML Connect watch folders** for added stability.