5nine has released a free version of its 5nine Security product, called 5nine Security for Microsoft Hyper-V with built-in Security and Compliance Scanner v1.0. 5nine Security for Hyper-V Free provides a host-based / agent-less security solution for virtual machines running on top of Hyper-V. The product is also availble in paid versions (Standard and Datacenter editions) which ofcourse provide more functionality, as detailed in this product comparison.
The solution provides anti-virus and anti-mailware scanning for hosts and virtual machines, a virtual firewall, and control over each VM – which are controlled using a centralized management console, via PowerShell of via WCF APIs. The built-in Security and Compliance Scanner will help you to investigate present and potential security problems on your server. It also performs an aggressive anti-malware scan on a server during the overall scanning process. Upon scan completion Security and Compliance Scanner provides detailed reports on each identified security issue.