Converting SSL Certificate Extension From .cer To .crt

Published: 11 Mar 2020
Last Modified Date: 08 Jul 2022

Question

How to convert SSL certificate extension from .cer to .crt to meet Tableau Server SSL certificate requirements.

Environment

Tableau Server

Answer

For Tableau Server on Windows

1. Open the Command Prompt as an administrator, set the OpenSSL configuration environment variable (optional)
set OPENSSL_CONF=c:\Program Files\Tableau\Tableau Server\packages\apache.<version_code>\conf\openssl.cnf

2. Change to the Apache directory for Tableau Server. For example, run the following command:
cd C:\Program Files\Tableau\Tableau Server\packages\apache.<version_code>\bin

3. Run the following command to convert:
openssl x509 -inform PEM -in "<path>\<filename>.cer" -out certificate.crt

For Tableau Server on Linux

1. Change to the Apache directory for Tableau Server:
/opt/tableau/tableau_server/packages/apache.<version>

2. Run the following command to convert:
openssl x509 -inform PEM -in "<path>\<filename>.cer" -out certificate.crt

Additional Information

All certificate files must be valid PEM-encoded X509 certificates with the extension .crt.
If the certificate extension from a commercial certificate authority (CA) is .cer, use the OpenSSL toolkit to convert SSL certificate extension from .cer to .crt.