7.4 Ensure that all Docker swarm overlay networks are encrypted
Information
Ensure that all Docker swarm overlay networks are encrypted. Rationale: By default, data exchanged between containers on nodes on the overlay network is not encrypted. This could potentially expose traffic between containers.
Solution
You should create overlay networks the with --opt encrypted flag. Impact: None Default Value: By default, data exchanged in overlay networks in Docker swarm mode is not encrypted.