Friday, April 19, 2024

Filezilla TLS errors

When using Filezilla on Linux Mint at work, connecting to an FTP server, after logging in, I get some errors like the following:


Command: LIST
Response: 150 Opening BINARY mode data connection.
Error: GnuTLS error -110: The TLS connection was non-properly terminated.

Some file transfers go through, while some get 550 errors - when I close Filezilla and open it again, the transfer succeeds.
 
Later, when using Windows and downloading using a domestic BSNL fiber line, there were no errors.
 
According to this set of posts on serverfault, it may have been due to either the firewall gateway blocking passive mode FTP or it may have been something to do with implicit/explicit TLS.

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