# Segmentation: review permitted outbound traffic

https://thiago.limaesilvatecnologia.com.br/en/artigos/network-egress/

Published: 2026-09-12

Connection destinations are part of the exposure boundary.

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Reading-path month: May 2026

Collection published on September 12, 2026. Months organize the reading path; they are not earlier publication dates.

A short architecture article. The technical reference supports the topic; hypothetical scenarios and assessment proposals are editorial analysis, not accounts of personal implementations.

## The architecture decision

A service protected from unsolicited inbound traffic may still initiate broad connections. Review what happens when its process reaches destinations outside its purpose.

## Practical application

Editorial proposal: list outbound dependencies by purpose and owner. In a hypothetical integration, distinguish operational traffic from temporary diagnostic conveniences.

## How to verify

Test destination unavailability and observe fallback attempts. Record alerts and recovery. Balance restriction with maintainability: a poorly understood rule requiring broad exceptions during every incident tends to lose value over time.

## Sources

- [OWASP — Network Segmentation Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Network_Segmentation_Cheat_Sheet.html). Accessed: 2026-09-12.

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