I see random FTP access errors and can't connect! Why?

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Edge100x
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I see random FTP access errors and can't connect! Why?

Post by Edge100x »

If you are using an FTP program that opens multiple connections to the FTP server at a time in order to parallelize uploads and downloads, that can cause these symptoms. Our FTPs here are configured to only allow 10 connections at once per account, which can lead to the inability to connect if more than that number are opened; the access problem stems from trying to change a file or directory that your FTP client is currently working on in the background.

The FTP client that is seen to most commonly cause problems is FileZilla, as it defaults to using concurrent connections. To turn that feature off, follow these steps.
  1. Open your FileZilla client.
  2. Choose "Edit" and "Settings"
  3. Chose "Transfers" from the menu on the left.
  4. Under "Concurrent transfers", find the option labelled "Maximum simultaneous" transfers. Change the value in the box to "1".
  5. Click "Ok" and restart your FileZilla client, then reconnect to your FTP.
Also, always make sure that your server is turned off if you are replacing existing files. Many files (DLLs, for instance) will have write access locked while they are in use by the server.
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