A Splunk instance that uses only the legacy cipher cannot communicate at all with a Splunk instance that uses only the new cipher suite and MAC.Ĭonfigure cipher usage and decryption with configuration filesīy default, versions of Splunk software 7.2 and higher use both the legacy cipher and new cipher suite and MAC for communications between instances, depending on the version of the instance they communicate with:.

Splunk-to-Splunk communication happens using either the legacy cipher or the new cipher suite/MAC, not both.

You must run version 7.2 or higher to take advantage of the stronger encryption capabilities that the new cipher suite and MAC offer.

Versions of on-premises Splunk software lower than 7.2 do not have the new cipher suite and MAC, and cannot have either integrated within them.

The main points for understanding how to use the ciphers are: Later, after you have upgraded all instances in your deployment to version 7.2 or higher, you can disable the legacy cipher and your Splunk instances continue internal communications using only the new cipher suite and MAC.

This backward compatibility lets you plan upgrades for your Splunk and universal forwarder instances while maintaining secure communications between the instances. They have also been configured to use the existing legacy cipher for backward compatibility in both data encryption and node authentication with versions lower than 7.2. Previously, the legacy cipher handled both types of operations.īy default, version 7.2 and higher of Splunk software uses the new cipher suite and MAC for these types of communication. It uses a separate MAC to handle node authentication during communications between Splunk instances. The new cipher suite uses a stronger, more secure mechanism for encrypting and decrypting file-based data. The cipher suite and MAC replace the current cipher that Splunk software has used for these types of communications. Version 7.2 of Splunk Enterprise, Splunk Light, and the universal forwarder introduces a new cipher suite and message authentication code (MAC), that it uses for data encryption and secure communications between Splunk software instances. Configure secure communications between Splunk instances with updated cipher suite and message authentication code

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