I'm looking for a web filtering solution and as 100% of the infra-structure of my client is virtualised, I would prefer to use a software as an appliance or installed on a Windows server VM.
We used WebMarshall in the past installed on a standalone server, it worked but I don't find it very good. For other clients we used Bloxx as a physical appliance and worked well, but quite pricey. They offer the Virtual Machine solution, but it costs he same as a physical version so we decided to not use the VM, basically we are wasting resources on our network without any discount.
I had some bad experiences with Microsoft ISA server, which was later called TMG or something like that. So far it looks microsoft stopped developing it and has no other web filtering alternative. Do you guys know if they are offering anything else?
What other alternatives would you guys suggest? Especially if it can run as a VM appliance or installed on a Windows server.