Docker Networking in Production: What Most Teams Get Wrong
Cloud Native Now, Wednesday, June 10th, 2026
Docker's default networking creates production security risks that proper configuration can prevent without extra tools.
Docker's default bridge network lacks name-based DNS resolution and network isolation, creating security risks in production.
The article recommends user-defined networks for automatic DNS and container isolation, and segmenting apps by function (frontend, backend, database) onto separate networks to limit lateral movement.
The --internal flag restricts outbound traffic for services that shouldn't reach external endpoints, while --network host should be avoided since it eliminates isolation. These choices require no extra tooling and represent the main gap between development and production Docker deployments.