Enabling and disabling encryption for communication among search nodes
For on-premises deployments, enable encryption for communication among search nodes to prevent unauthorized access to the data that is transported across search nodes. By default, search is encrypted for cloud services and applications.
When you enable or disable encryption, all nodes in the cluster are reinitialized, which might take some time.
In the header of Dev Studio, click.
Expand the Security settings section.
Select or clear Encrypt search inter-node communication.