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SSL protocol error [60000]
Some FTPS servers incorrectly close the data channel after sending a stream of data.
When this happens, the Robo-FTP trace log will have an error that looks something like this:
Tue Nov 03 09:28:56 => Error: LIST command failed: SSL protocol error [60000]
The error will vary depending on the version of Robo-FTP you are using. For example, in Robo-FTP 3.11.x, the error looks like this:
[2019-05-27 09:19:13.823746+02:00|FTPClient|1733|Inet] Passive data channel connection error 12429:[1261] short read
If you are using Robo-FTP v3.6.12 or later you can work around this issue by using the /allowerrors option with the FTPLOGON command to tell Robo-FTP to accept the incorrect response from the server.
WARNING: Using this workaround introduces a potential security risk. The better solution is to advise the server administrator to patch their server so it correctly closes the data channel. See this article for details about this issue: On FTP, SSL and broken interfaces.
Article last updated: 2022-01-13
Tags: SSL, FTPS