This is the desired setup for securing a database server from direct access from the outside world. In this way, both can communicate with each other, but cannot connect to the outside world. We can connect the web server and database server using a Host-only adapter. These appliances contain several virtual machines running different applications like database servers, web servers, etc. In the case of virtual appliances which are already configured, the Host-only networking helps a great deal. Instead, the software interface (named as vboxnet) will perform the same function. For this mode, there is no need for the physical interface of the host machine. Also, unlike the Internal networking mode, Host-only mode provides DHCP services to assign IP addresses to the connected virtual machines. In the case of the Internal networking mode, the connectivity is limited to virtual machines on the same Host. This means that in this mode, a virtual machine can connect to the Host and other virtual machines. But in the latter case, there is a security risk of passing virtual machine traffic through the physical interface of the Host.Ī Host-only networking mode creates a network between the Host machine and virtual machines using a software interface (NIC). Note: It should be clear that all the functions that can be achieved with internal networking can also be performed through Bridge Networking. Similarly, in the case of internal networking mode, virtual machines can only talk to each other but cannot communicate with the host machine and any other machine outside of their set as they are not connected to any physical interface.
In bridge mode, a virtual machine can communicate with the host machine and other virtual machines because they share the same physical interface of the host machine. Host-only networking performs the combined functions of bridged and internal networking modes. Let us first understand the concept and how to use the Host-only networking mode. After connecting them in a Host-only mode, we will check if both of them can ping each other and the Host machine.
We will use two virtual machines: 1) Fedora 34 2) Ubuntu 20.04. In this guide, we will learn how we can configure Host-only networking mode in a VirtualBox virtual machine. Not Attached (network card is present, but the cable is unplugged)ħ. There are six networking modes supported in VirtualBox, namely:ġ. It has many powerful networking features to set up any desired configuration. We do not need to mess up with our main Host OS. With VirtualBox, we can run multiple operating systems simultaneously. VirtualBox is one of the popular virtualization platforms from Oracle Corporation.
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