Endace Packet Forensics Files: Episode #58

Michael talks with Stephen Donnelly about the importance of packet capture in cloud environments.

By Michael Morris, Director of Global Business Development, Endace


Michael Morris, Director of Global Business Development, Endace

In this episode of the Endace Packet Forensics Files, I talk with Stephen Donnelly, CTO of Endace, about why packet capture is essential in cloud environments. He shared an amusing anecdote about an executive claiming, “Cloud doesn’t have packets.” While humorous, it highlights a misunderstanding of cloud technology. Even though cloud networks are more abstract, they still rely heavily on network packets, just like traditional on-premises systems.

Why Packet Capture Matters in the Cloud

There are two main reasons why packet capture is as important in the cloud as it is on-premises:

  1. Network Operations: Packet data is crucial for diagnosing and troubleshooting issues like slow network speeds, downtime, and performance problems. Without packet capture, it becomes difficult to identify and resolve network challenges, even in cloud environments.
  2. Security: Cloud environments face the same security threats as traditional networks. Packet capture plays a vital role in security operations, including detecting threats, incident response, and maintaining overall security. “DEATH” (Detection Engineering and Threat Hunting) emphasizes the need for proactive security in cloud environments.
How to Capture Packets in the Cloud

Several methods exist for capturing packets in cloud environments, each with its own advantages and challenges:

  • Port Mirroring Services: Many cloud providers offer services that allow traffic from virtual machines or containers to be captured. However, these services often come with limitations, such as performance impacts and visibility gaps.
  • Cloud Packet Brokers: These tools use software agents installed on virtual machines to capture and forward traffic. While useful, this method can consume additional CPU and network resources.
  • In-line Devices: Firewalls and routers can mirror traffic for packet capture, but cloud-based devices may not offer all the features of their physical counterparts, requiring thorough research.
Conclusion

Capturing packets in the cloud brings challenges, including performance impacts, visibility gaps, and costs. These factors should be carefully considered when developing a packet capture strategy.

The belief that packet capture isn’t needed in cloud environments is a myth, and a dangerous one. Packet capture is just as important in the cloud as it is in traditional networks. It provides the visibility and security needed to effectively manage and protect cloud environments. As more organizations move to the cloud, the need for strong packet capture solutions only increases.

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Other episodes in the Secure Networks video/audio podcast series are available here. Or listen to the podcast here or on your favorite podcast platform.