Splunk® Enterprise

Securing the Splunk Platform

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Splunk Enterprise version 7.2 will no longer be supported as of April 30, 2021. See the Splunk Software Support Policy for details. For information about upgrading to a supported version, see How to upgrade Splunk Enterprise.
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Determine your cipher suite

You can select and specify a cipher suite for inter-Splunk, Splunk Web, and Splunk forwarder to indexer communications. You add your cipher suite by appending a line at the end of your server SSL configuration stanza.

The following is an example of how you would updated inputs.conf when configuring forwarder to indexer certificate authentication: 

[splunktcp-ssl:9998]
[SSL]
password = password
requireClientCert = false
rootCA = $SPLUNK_HOME/etc/auth/cacert.pem
serverCert = $SPLUNK_HOME/etc/auth/server.pem
cipherSuite = AES256-SHA256:DHE-RSA-AES256-SHA256

To see which ciphers are available to you: 

 $SPLUNK_HOME/bin/splunk cmd openssl ciphers -v
 $SPLUNK_HOME/bin/splunk cmd openssl ciphers -v "TLSv1.2"
 $SPLUNK_HOME/bin/splunk cmd openssl ciphers -v "HIGH"

Cipher suites are available to you based on your version of OpenSSL. To see which version of OpenSSL you are running: 

 $SPLUNK_HOME/bin/splunk cmd openssl version
Last modified on 16 October, 2014
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This documentation applies to the following versions of Splunk® Enterprise: 6.3.0, 6.3.1, 6.3.2, 6.3.3, 6.3.4, 6.3.5, 6.3.6, 6.3.7, 6.3.8, 6.3.9, 6.3.10, 6.3.11, 6.3.12, 6.3.13, 6.3.14, 6.4.0, 6.4.1, 6.4.2, 6.4.3, 6.4.4, 6.4.5, 6.4.6, 6.4.7, 6.4.8, 6.4.9, 6.4.10, 6.4.11, 6.5.0, 6.5.1, 6.5.2, 6.5.3, 6.5.4, 6.5.5, 6.5.6, 6.5.7, 6.5.8, 6.5.9, 6.5.10, 6.6.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 6.6.5, 6.6.6, 6.6.7, 6.6.8, 6.6.9, 6.6.10, 6.6.11, 6.6.12, 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5, 7.0.6, 7.0.7, 7.0.8, 7.0.9, 7.0.10, 7.0.11, 7.0.13, 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.1.6, 7.1.7, 7.1.8, 7.1.9, 7.1.10, 7.2.0, 7.2.1, 7.2.2, 7.2.3, 7.2.4, 7.2.5, 7.2.6, 7.2.7, 7.2.8, 7.2.9, 7.2.10, 7.3.0, 7.3.1, 7.3.2, 7.3.3, 7.3.4, 7.3.5, 7.3.6, 7.3.7, 7.3.8, 7.3.9, 8.0.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8, 8.0.9, 8.1.0, 8.1.1, 8.1.2, 8.1.3, 8.1.4, 8.2.0

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