Robo-FTP Server

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When using the GETSITEFILE command, the FTP server keeps dropping the connection at seemingly random intervals without all files being transferred. (Robo-FTP 3.5 and earlier)

First, you will find that the connection most likely can be reset by simply logging off and logging back on to the FTP server. It is very likely that the cause of the "random" disconnects is that you are trying to connect to the FTP server through a firewall. The firewall may erroneously believe it is under "attack" since a script file loop issuing GETSERVERFILE commands would generate seemingly constant FTP requests that may be seen as flooding the connection through the firewall.

The firewall will very likely drop the connection to protect itself and any further FTP requests are ignored until the connection is reestablished. The disconnect could happen at any time hence the random time interval between connections being accepted and then disconnected. This problem should be overcome by checking the Passive option in the Robo-FTP Configurator for the server you are having difficulties maintaining a connection to.

Robo-FTP 3.6 and later uses a delay between requests that should prevent this situation from happening.

Also, Robo-FTP 3.10 and later automatically recovers from dropped connections.

Article last updated: 2016-05-16

Tags: Robo-FTP, passive mode, Firewall

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