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After connecting to a remote host, the PutFile attempts fails with the error "Failed to accept PutFile data connection".
We've successfully used this FTP capability for some time now, but suddenly it fails.

We can reach the remote host just fine with FileZilla, and send files with no problem.

Is the error potentially due to a change at the Remote host, but effecting only the connection with Chilkat? If not what else could be causing the problem?

asked Mar 09 '16 at 08:33

tschoenmaker's gravatar image


I did follow up with out I.T. folks and finally discovered it was the firewall. Problem resolved. Thanks for pointing me in the right direction, chilkat ♦♦.


answered Mar 10 '16 at 11:09

tschoenmaker's gravatar image


  1. Check your Windows Firewall -- it will block "unknown programs", but allow "known programs" -- which are programs where an exception has been made to allow it to get past the firewall. I would guess that FileZilla's installer is automatically adding the exception to your Windows Firewall.
  2. If FileZilla works and Chilkat does not, then it can only be that you're doing something different with Chilkat. Every possible option that FileZilla provides, Chilkat also provides. The solution is to make Chilkat do exactly the same as FileZilla.

answered Mar 09 '16 at 08:47

chilkat's gravatar image

chilkat ♦♦

Is this SSL?


answered Mar 10 '16 at 11:05

cdlvj130's gravatar image


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Asked: Mar 09 '16 at 08:33

Seen: 964 times

Last updated: Mar 10 '16 at 11:23

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