Error
Error Code: ORA-28173

Oracle Error ORA-28173: Missing Certificate

📦 Oracle Database
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Description

The ORA-28173 error occurs when Oracle Database expects a client certificate for authentication via a proxy user, but the certificate is missing. This commonly happens when using proxy authentication with SSL/TLS and the client fails to provide the necessary certificate.
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Error Message

ORA-28173: certificate not provided by proxy
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Known Causes

3 known causes
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Missing Client Certificate
The client application or user has not been configured to send a certificate during the SSL/TLS handshake with the Oracle Database server. This is a common configuration error.
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Proxy User Configuration
The proxy user in Oracle Database may not be correctly configured to require or accept client certificates for authentication. The proxy user might be expecting a certificate but the configuration is incomplete.
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SSL/TLS Configuration
The SSL/TLS configuration on either the client or the server might be incorrect, preventing the client from successfully presenting the certificate. Incorrect cipher suites or protocol versions could be the issue.
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Solutions

Coming Soon

Detailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:

General Troubleshooting Tips

  • Check the error message carefully for specific details
  • Review recent changes that might have caused the error
  • Search for the exact error code in the official documentation
  • Check log files for additional context
  • Try restarting the application or service

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