Error while creating connection in ADF to FTP

Question

I am getting below error while creating linked service.

Failed to connect to FTP server. Please make sure the provided server information is correct, and try again. A call to SSPI failed, see inner exception. The message received was unexpected or badly formatted

Any idea how it to resolve this?

Answer 1

Here, the issue is related to SSPI. SSPI is a Windows component. It may be different according to OS versions. As per this, the above error indicates that the server certificate uses an unsupported format (for instance, uses an unknown cipher) and thus cannot be processed by the SSPI layer. You can try the following solutions:

• Upgrade Windows
• Downgrade the server certificate
• Attempt to connect without using SSL

For more information, refer to this MS document.

Answer 2

Above error may come when below happens

• incorrect server information or firewall settings or SSL/TLS settings.

you can also try connecting FTP via different client, this will help determine if the issue is specific to azure data factory or general connectivity issue.