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How do I block a host from accessing the internet while allowing the VMWare workstation VM?

I have a VMware workstation on my host computer (windows 7) and the VMware workstation has a virtual machine (windows 7) on the host. We were trying to allow internet access only to the Virtual machine, i.e. to minimize exposure of the host to the internet.

I tried to use Vlan Access Control list with MAC ACL to deny the host virtual machine from accessing the internet and allow all other traffic including the virtual machine. The configuration works for some  time and after some time when the virtual machine continously pings the c3750 switch (wher the VACL is implemented), the host also pings the c3750 switch and re-establishes connection with the internet. But when we configured the c3750 switch to deny the VM and allow all other traffic, it works fine. It seems like the host automatically finds a way to get arround the VACL.

If you have an idea, please help.

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