Error
Error Code: ORA-28171

ORA-28171: Unsupported Kerberos Version

📦 Oracle Database
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Description

The ORA-28171 error in Oracle Database indicates that the Kerberos ticket presented by the client is using an unsupported version. This typically occurs during authentication attempts when Kerberos is configured for network security.
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Error Message

ORA-28171: unsupported Kerberos version
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Known Causes

3 known causes
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Outdated Kerberos Version
The client is using an older or newer Kerberos version than supported by the Oracle database server. This version incompatibility prevents successful authentication.
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Configuration Mismatch
The Kerberos configuration on the client or server is incorrect, leading to the generation of an unsupported ticket version. Mismatched encryption types can cause this.
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Kerberos Library Issues
The Kerberos libraries on either the client or server are outdated or corrupted, preventing proper version negotiation. Ensure libraries are up to date.
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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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