Ratnangi Nirek
Sr Cloud Escalation Engineer
San Jose, California, United States
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I'm a Senior Cloud Escalation Engineer and Subject Matter Expert specializing in Linux and Cloud for our Customer Service Support in Microsoft, focusing on delivering top-notch support to our clients. I'm passionate about knowledge sharing and mentorship, helping to ramp up new team members and fostering technical growth. I collaborate with various teams to drive innovation and excellence in service delivery.
Additionally, I lead efforts to build communities and promote collaboration among peers, aiming to enhance our collective expertise for better customer outcomes.
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Zero Trust Starts at the Linux Host
Zero Trust is often implemented through network segmentation and centralized identity systems, yet most breaches succeed after an attacker compromises a Linux host. This session shifts the Zero Trust conversation to where enforcement truly matters the operating system itself. Attendees will learn how to apply host-based Zero Trust principles using native Linux controls, and why host enforcement is more effective than network segmentation alone at preventing lateral movement. The talk explores practical use of mTLS, host firewalling, and workload identity to secure service-to-service communication without relying on implicit trust. Finally, it addresses how organizations can apply Zero Trust to legacy Linux workloads without application rewrites, enabling incremental security improvements while maintaining operational stability. This session delivers actionable strategies for securing Linux systems in modern and hybrid environments.
Key points:
Host-based Zero Trust principles
Network segmentation vs. host enforcement
mTLS, firewalling, and workload identity
Applying Zero Trust to legacy Linux workloads
Linux Live Patching: Architecture, Maturity, and Operational Reality
Linux Live Patching enables the application of critical kernel updates without requiring system reboots, addressing the growing demand for continuous availability in modern Linux deployments. As Linux underpins cloud infrastructure, telecommunications platforms, and mission-critical enterprise systems, rebootless patching has moved from a niche capability to an operational necessity.
This talk provides a practical overview of Linux live patching as implemented in the mainline kernel. It explains how live patching works at the function level, the kernel infrastructure that enables it, and the trade-offs involved in applying kernel changes at runtime. Attendees will gain insight into where live patching is effective, where it is not, and how it is used in real-world production environments.
Ratnangi Nirek
Sr Cloud Escalation Engineer
San Jose, California, United States
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