![]() ![]() A useful table comparing the differences between the three virtual network card settings (the third is host only) can be viewed here. The scanner then interprets the missing data as a false negative, thus invalidating any scan results. This is because using NAT adds extra processing overhead to any data transmitted to and from the VM, which, when combined with the already large amount of processing required to handle all the data being transmitted in a vulnerability scan, ensures that some data is lost in transit. From a penetration testing perspective, this is vital as many scanning tools, such as vulnerability scanners, will fail to work properly in a NATed environment. When bridged, a VM will have its own IP address on your actual network and will act as if it is a physically separate system on the network. Using NAT is fine for the majority of VM usage, however, there are some circumstances where it’s better to have your VM in bridged mode. At a basic level, this means that your VM will share an IP address with your host operating system (OS). Your host will then use the concept of NAT to ensure that responses to traffic emanating from your VM are directed to it accordingly. By default, VMware Player will use Network Address Translation (NAT) to provide your virtual machine (VM) with network connectivity. ![]()
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