Here are a few title options that fit the question-answer format you requested: Option 1 (Focus on the problem): * Azure SQL Database v12 Upgrade: Why am I getting TLS Handshake Errors? Option 2 (F-Golang-php.cn

Here are a few title options that fit the question-answer format you requested: Option 1 (Focus on the problem): * Azure SQL Database v12 Upgrade: Why am I getting TLS Handshake Errors? Option 2 (F

Mary-Kate Olsen

Oct 26, 2024 pm 11:48 PM

Here are a few title options that fit the question-answer format you requested:

Option 1 (Focus on the problem):
* Azure SQL Database v12 Upgrade: Why am I getting TLS Handshake Errors?

Option 2 (Focus on the resolution):
* How to Fix TLS Handshake Err

TLS Handshake Error: Azure SQL Database Upgrade to v12 Impacts Connections

An Azure SQL Database upgrade to version 12 (v12) has caused connectivity issues for some applications, resulting in this error:

TLS Handshake failed: x509: certificate is valid for
tr12.northcentralus1-a.worker.database.windows.net,
*.tr12.northcentralus1-a.worker.database.windows.net, not [server-name].database.windows.net

Cause

The error occurs because the certificate presented by the Azure SQL Database is not valid for the server name specified in the connection string. This is due to a change in the way v12 handles certificate validation.

Resolution

To resolve the issue, modify the connection string to include the following parameters:

TrustServerCertificate=True;
hostNameInCertificate=*.database.windows.net;

Additional Notes

The Azure portal suggests setting TrustServerCertificate=False and leaving hostNameInCertificate empty. However, for some applications, this may not work.
Trusted connections should not be used.
Encryption should be enabled.

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