Microsegmentation is a technique that divides a network into smaller segments or zones, each with its own security policies and controls. This helps to isolate and protect workloads and applications from each other, and limit the lateral movement of threats within the network. Microsegmentation can be applied to different platforms and environments, such as virtual machines, containers, cloud services, and endpoints. Microsegmentation can also improve the visibility and enforcement of network traffic, as well as the performance and scalability of security solutions.
In the context of applications or containers on the same node, microsegmentation can limit the communication between them by enforcing granular policies based on attributes such as identity, context, and behavior. For example, microsegmentation can restrict which ports, protocols, or services are allowed for each application or container, and block any unauthorized or malicious traffic. Microsegmentation can also prevent the exposure of sensitive data or resources to other applications or containers on the same node, or to external attackers who may compromise one of them.
Container orchestration, microservicing, and Software-Defined Access are not directly related to limiting the communication between applications or containers on the same node. Container orchestration is a process of managing the lifecycle, deployment, and scaling of containers across a cluster of nodes. Microservicing is an architectural style of developing applications as a collection of loosely coupled, independent, and modular services. Software-Defined Access is a network architecture that abstracts the network infrastructure from the network policies, and enables consistent and secure access to any application or service across any domain. References:
Implementing and Operating Cisco Security Core Technologies (SCOR) v1.0, Module 5: Securing the Cloud, Lesson 5.1: Describing Cloud Computing and Deployment Models, Topic 5.1.4: Microsegmentation
What Is Micro-Segmentation? - Cisco
Communicating With Docker Containers on the Same Machine - Baeldung on Ops
