Why is north-south traffic important?

It represents the boundary between internal systems and the outside world, making it a key control point for security.

What security mechanisms are used for north-south traffic?

Common controls include firewalls, proxies, and web filtering to monitor and manage traffic.

What is a simple example of north-south traffic?

When employees access external services, or when customers connect to an organization’s applications.

How does north-south traffic relate to the attack surface?

It represents entry and exit points to the network, and is often where attacks begin or are detected.

North-south traffic

What is north-south traffic?

North-south traffic describes data moving in and out of a network, typically between internal systems and external services on the internet.

This is the most visible type of traffic in an organization and is where traditional security controls such as firewalls, proxies, and web gateways operate. It represents the boundary between internal environments and the outside world, making it a key control point for protecting systems and data.

In practice, north-south traffic includes how employees access external services, how customers reach applications, and how data is exchanged with external systems.

A simple way to understand it is to think of the main entrance to a building. All traffic entering or leaving must pass through this point, where access and activity can be controlled.

Sicra and north-south traffic

North-south traffic is a core concept in network security and architecture work.

At Sicra, it is used to assess how organizations expose services, control traffic, and manage risk at the boundary between internal and external systems.

This is especially relevant when analyzing attack surface, designing security controls, and building architectures that balance accessibility and security.

Services

Need Assistance?

We are happy to have a non-binding conversation.