Splunk® Enterprise

Securing 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
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This documentation applies to the following versions of Splunk® Enterprise: 5.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4, 5.0.5, 5.0.6, 5.0.7, 5.0.8, 5.0.9, 5.0.10, 5.0.11, 5.0.12, 5.0.13, 5.0.14, 5.0.15, 5.0.16, 5.0.17, 5.0.18, 6.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9, 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.14, 6.1, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8, 6.1.9, 6.1.10, 6.1.11, 6.1.12, 6.1.13, 6.2.0, 6.2.1, 6.2.2, 6.2.3, 6.2.4, 6.2.5, 6.2.6, 6.2.7, 6.2.8, 6.2.9, 6.2.10, 6.2.11, 6.2.12, 6.2.13, 6.2.14, 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, 6.4.0, 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, 6.5.0, 6.5.1, 6.5.1612 (Splunk Cloud only), 6.5.2, 6.5.3, 6.5.4, 6.5.5, 6.5.6, 6.5.7, 6.5.8, 6.5.9, 6.6.0, 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, 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5, 7.0.6, 7.0.7, 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.2.0, 7.2.1


Comments

You may wish to look at visiting the "Configure allowed and restricted SSL versions" which will also change the cipher suites in use with Splunk:
http://docs.splunk.com/Documentation/Splunk/latest/Security/SetyourSSLversion

Garethatiag
March 10, 2016

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