MRMCD2024 we know perimeter security is dead - how to get over it and where to?

Perimeter security based solely on network boundaries is no longer effective in modern enterprise environments - companies need to evolve beyond the “castle and moat” model

Zero-trust architecture principles are critical:

• Never trust, always verify
• Base trust on cryptographic verification rather than network location
• Implement mutual TLS with client certificates
• Assume breach and plan accordingly

Network segmentation recommendations:

• Break networks into smaller micro-segments
• Reduce dependencies between segments
• Implement least privilege access
• Use Bastion hosts for administrative access
• Treat company network like the internet

Legacy systems pose challenges:

• Old applications often depend on perimeter security
• Legacy crypto libraries may not support modern security
• Need strategies to isolate and protect legacy components
• Consider cloud migration as opportunity to modernize

Cloud transition considerations:

• Don’t just “lift and shift” to cloud
• Leverage cloud-native security capabilities
• Use infrastructure as code
• Implement proper identity management
• Plan for hybrid/multi-cloud environments

Key focus areas for modern security:

• Application security becomes critical
• Proper logging and monitoring
• Identity and access management
• Incident response planning
• Regular backup testing

Remote work implications:

• Physical office boundaries are disappearing
• Need to secure distributed workforce
• VPN-centric approaches don’t scale well
• Consider zero-trust network access solutions