• We value your experience with Plesk during 2024
    Plesk strives to perform even better in 2025. To help us improve further, please answer a few questions about your experience with Plesk Obsidian 2024.
    Please take this short survey:

    https://pt-research.typeform.com/to/AmZvSXkx
  • The Horde webmail has been deprecated. Its complete removal is scheduled for April 2025. For details and recommended actions, see the Feature and Deprecation Plan.
  • We’re working on enhancing the Monitoring feature in Plesk, and we could really use your expertise! If you’re open to sharing your experiences with server and website monitoring or providing feedback, we’d love to have a one-hour online meeting with you.

Resolved Error 550 SSL/TLS required on the control channel

Necroman

Basic Pleskian
Hi! I always get this error when trying to manage files on my webspaces.

It says:
Unable to connect to Plesk
550 SSL/TLS required on the control channel

Screenshot attached

Can someone help? Thanks!
 

Attachments

  • tmp_30956-Screenshot_2015-09-22-05-44-19-1375272373.png
    tmp_30956-Screenshot_2015-09-22-05-44-19-1375272373.png
    51.7 KB · Views: 17
Hi Necroman,

did you try to set both ( FTP AND FTPS ) connections to be valid at: Plesk > Tools & Settings > Security Policy ( FTPS usage policy ) ? If yes, please change the setting and hit "o.k." and please re-change the setting back to both usage again.
 
Hi!
I have Allow only secure FTPS connections checked. If i change it to allow both won't the server be less secure?
If i allow both secure and non-secure it works, but shouldn't the app be updated to work with FTPS?
Thanks!
 
Hi Necroman,

the app does support FTPS, but your client was not requesting a secure connection, or the server denied the request, in case of misconfiguration(s), or missing certificate(s), or their misconfiguration(s). Please investigate with the help of log - files, why the server denied the access over FTPS for your client.

You have to decide for yourself, if a secure transfer is necessary or not. If you think, that your data - transfer absolutely needs a secure connection, then you will decide only to use secure connections. Your server is not less secure with both options.
 
Back
Top