SSL Content-type: Alert (21)

Unanswered Question
Feb 15th, 2009


During https connection after the handshake is successfully done, I am getting 'Encrypted Alert' message in Wireshark/Ethereal on one of the webpages. The alert error code is 21.

Does anyone know what Alert 21 means. Or is there any list for alert protocol error codes and its description.

I have this problem too.
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robertson.michael Sun, 02/15/2009 - 19:00


It looks like alert code 21 means that the message could not be unencrypted:

I've never experienced this problem, so I'm not sure how to proceed in troubleshooting it. Could the packets be corrupted during transportation?

Also, you mentioned "one of the webpages". Does this mean that you are only having this error when visiting a single page and all other pages are working? If so, you may want to look at the application side of things on the web server.

Hope that helps.



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