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FTP and only one connection #10706

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cyberduck opened this issue May 20, 2019 · 6 comments
Closed

FTP and only one connection #10706

cyberduck opened this issue May 20, 2019 · 6 comments
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bug fixed ftp FTP Protocol Implementation
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@cyberduck
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12d27f1 created the issue

Hi,

it seems that the options "Use browser connection" or "Use single connection" (in preferences > Transfers) do not really force Cyberduck into using only one FTP connection.

I use a FTP server that accepts only one connection at a time from the same IP.

I tried both above settings, and I always get an error in Cyberduck (see attached image) when I start a transfer (download or upload) while the Cyberduck browser is open without problem.

image_01.png

I checked manually (with the command line "ftp" : no problem to make a transfer).
I also tried to manually start a transfer (while Cyberduck is open with a browser connected to my FTP server) then the command-line ftp gives me the clear reason:

421 There are too many connections from your internet address.

Therefore this raises two conclusions:

  1. Cyberduck should give the whole error message (and not only the error code 421) that would make it easier to understand in such a case.
  2. Cyberduck should not open a second connection (in addition to the one for the browser) when the preferences are set so.

Is it possible to ensure that attended behaviour with one of the two mentioned preferences (or with both)?


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@cyberduck
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@dkocher commented

In 55057ec. Please update to the latest snapshot build available.

@cyberduck
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12d27f1 commented

After updating to the latest snapshot nightly build -- Version 7.0.0 (30730) -- I still observe the same problem of Cyberduck making my FTP server raise a FTP error 421 by opening more than one connection.

@cyberduck
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@dkocher commented

Regression from e059034.

@cyberduck
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@dkocher commented

In 5d09bb4, dbecfbe.

@cyberduck
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12d27f1 commented

I confirm that this is fixed with the new snapshot build: Version 7.0.0 (30769).
Many thanks.

@cyberduck
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@dkocher commented

Ticket retargeted after milestone deleted

@iterate-ch iterate-ch locked as resolved and limited conversation to collaborators Nov 26, 2021
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