How to resolve SSL_connect error when VPN is enabled
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01-07-2025 01:56 AM
I am trying to connect to Databricks using ODBC protocol with Simba Driver DSN. I am able to successfully connect and access the data when our corporate VPN is turned OFF. but when it's turned ON , I am getting the following error "[Simba][ThriftExtension] (14) Unexpected response from server during a HTTP connection: SSL_connect:"
how to resolve this ?
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01-07-2025 02:54 AM
The error you are encountering, " (14) Unexpected response from server during a HTTP connection: SSL_connect:", when trying to connect to Databricks using the ODBC protocol with the Simba Driver DSN while the corporate VPN is turned on, is likely related to SSL certificate verification issues
Here are some steps you can take to resolve this issue:
-
Check SSL Certificate Configuration:
- Ensure that the SSL certificates are correctly configured. You might need to disable SSL certificate verification if you are using self-signed certificates or if there are issues with the certificate chain.
- You can do this by setting the
AllowSelfSignedServerCert
option to1
and theAllowHostNameCNMismatch
option to1
in your DSN configuration. This can be done in thesimba.sparkodbc.ini
file or through the ODBC Data Source Administrator.
-
Disable Certificate Revocation Check:
- If the issue persists, you can try disabling the certificate revocation check by setting the
CheckCertRevocation
option to0
.
- If the issue persists, you can try disabling the certificate revocation check by setting the
-
Use System Trust Store:
- Ensure that the
UseSystemTrustStore
option is set to1
if you want to use the system's trust store for SSL verification.
- Ensure that the

