Edimax Technology IC-3030iWn - Manual (Page 60)

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found that non-passive mode is not working, you can try
to use passive mode.
Click „Apply‟ to save settings and make the new settings take effect.
After that, you can click
„Upload a test file‟ to send a file to the FTP server you
set here, so you can make sure the setting you specified here is correct and
working.