Hot-extending a virtual disk is the act of increasing the capacity of a virtual disk while it’s operating and the guest OS is running. Today is a really simple operation to perform, on both ESXi and Hyper-V, but still very useful. We are going to see how to hot-extend a virtual disk connected to a running VMware ESXi virtual machine with the vSphere Web Client.

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Securing ESXi and vCenter servers is an essential part of any virtual infrastructure administrator’s responsibilities. VMware makes available a several features to protect the servers, including the ability to set granular permissions, a directory authentication mechanism, a firewall, a virtual switch layer 2 security and more. Knowing the capabilities of these features and how to use them is essential to administer ESXi and vCenter enviroments. Some years ago, only ESX came with a firewall, but with vSphere 5, VMware added a firewall to ESXi 5.

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This is a basic tutorial explaining how to add an ESXi Host to a directory service, like Microsoft’s Active Directory, to simplify the administration and security of the ESXi hosts. As prerequisites, you need: The ESXi host DNS server must resolve AD Domain controller and Domain Name The ESXi host name must be fully qualified with the domain name of the Active Directory forest, for example, esxtest1.contoso.local The time between the AD server and the ESXi Host should be syncronized Before specifying the Active Directory credentials you need to add the ESXi host to the domain controller.

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