Some updates, e.g., KB2656353, KB2656352, KB2657424, KB2656351, are not present in the list of approved updates. Why?
Updates for Microsoft .NET Framework are not approved by Virtuozzo WSUS because installation of .NET Framework on the Hardware Node itself is not recommended:
11220 Is it safe to install Microsoft .NET Framework on a Hardware Node?
If .NET Framework was installed on the Hardware Node and it is now needed to install corresponding updates, the only solution is to download and install these updates manually. However, Virtuozzo does not guarantee that the changes will be properly propagated to Containers.
If there are .NET-related problems inside a Container, it may be necessary to manually install these updates from inside the Container as well.