shubhamraj-git opened a new pull request, #67946:
URL: https://github.com/apache/airflow/pull/67946
Some FTPS servers are configured to require a protected data channel and
reject any data transfer that is not preceded by "PROT P". Against such a
server, the current `FTPSHook` / `FTPSFileTransmitOperator` path fails with:
`ftplib.error_perm: 550 SSL/TLS required on the data channel.`
After this change, the same operator interoperates correctly with both
permissive and strict FTPS servers.
This PR adds the missing `self.conn.prot_p()` call after login, matching the
standard `ftplib.FTP_TLS` usage documented in the Python stdlib:
> The user must explicitly secure the data connection by calling the
`prot_p()` method.
>
> — https://docs.python.org/3/library/ftplib.html#ftplib.FTP_TLS
##### Was generative AI tooling used to co-author this PR?
- [x] Yes - Claude Code (Opus 4.7)
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