Explore intrusion detection systems in cloud environments through this 21-minute conference talk by Dan Lambright at BDF 2015. Delve into the challenges of configuring IDS within software-defined networks, scaling open-source systems like Snort and Bro for monitoring multiple virtual machines, and managing hypervisor performance. Learn about running IDS as a separate machine to maintain performance, examine virtual network configurations, and discover future directions in cloud-based intrusion detection. Gain insights into the benefits of host-based IDS like OSSEC for detecting hypervisor breaches. Cover topics including network intrusion detection systems, Snort rules, tenants, bridges, sniffing, OpenStack, and file integrity monitoring.