ProFTP has a handy feature that lets uploads resume if they were interrupted, much like Safari downloads. This feature has to be enabled both on the server and the client.
By default however, resuming uploads are disabled for security reasons – a wise precaution if anonymous uploads are allowed to a server. Here’s how to enabled it.
Plesk uses ProFTP, and all we have to do is add a couple of lines to the /etc/proftpd.conf file. Anywhere will do, as long as it’s outside the “global” tags:
# allow resuming file uploads AllowStoreRestart on AllowOverwrite on
ProFTP is part of the xinetd system service, and for the change to take effect we’ll have to restart this:
service xinetd restart
To make use of this feature, an FTP client needs to support this feature too: in FileZilla it’s under Settings – Transfers – File Exists Action: