Your Service Fabric application is deployed on the Service Fabric cluster, which is a set of federated nodes that talk to each other over the network.
The generic structure of your Service Fabric cluster looks like the following:
Generic structure of Service Fabric cluster
As you can see, there are two types of communication channels that are used by the Service Fabric:
- Channel to enable communication between cluster nodes (node-node)
- Channel to enable communication between clients and nodes (client-node)
Although you can choose not to secure the communication channels, by using open channels anonymous users can connect to the cluster and perform management operations on it and alter the cluster. Security cannot be an afterthought of implementation as an unsecured Service Fabric cluster cannot be secured later. Therefore, you should consider security of your cluster prudently.