in that case you need to use an address between the lower and upper limits.
also gateway is probably the same as your dhcp server.

obviously, but the question was: exactly what was allocated in that case.

I assume you are running version 6 and I confess to not having played with its default settings much. looks like it should be using 10.0.0.2.x/24

Is this a guest you installed your self?

I have seen other posts with a VB vm where it was using 192.168.x.x/24 and the NAT gateway was 192.168.x.2.

Since I am making some bad assumptions by reference to pinging router are you referring to the VB internal NAT gateway or the physical router on the LAN? Do you know the LAN network settings?

The thing is that I have a homework to do and one of the requirements is that the server has the ip address 192.168.101.1. Also, i thought that the gateway and DNS should have the ip address of the physical router of the LAN.

I was referring to the gateway I set up in /etc/network/interfaces.

we still have no idea about your setup and configuration, therefore hard to way anything.
So you have a router, a dhcp server, a host, VMs, and who knows what. Need to know how are these devices connected to each other and to the internet, how are they configured and what do you want to achieve exactly (access internet from where?).

So, I have a physical router, a laptop that is connected to the router via Wi-Fi and on that laptop I have installed VirtualBox. Within VirtualBox, I have 2 VMs: one of them should act as a server and the other one should be the client. On the server VM I tried to set a static IP address. After I modified the /etc/network/interfaces and /etc/resolv.conf, I rebooted the VM and there was no internet connection. The only address I can ping is the address I chose for the ethernet interface (192.168.101.1).


/etc/network/interfaces:
auto enp0s3
iface enp0s3 inet static
address 192.168.101.1
netmask 255.255.255.0
network 192.168.101.0
broadcast 192.168.101.255
gateway 192.168.0.1 (this is the ip address of my physical router)
dns-nameservers 192.168.0.1 8.8.8.8 8.8.4.4

/etc/resolv.conf
nameserver 192.168.0.1
nameserver 8.8.8.8
nameserver 8.8.4.4

Your interface setup is:

But your gateway is not on that subnet (since third octet is different):

So your interface has no idea how to reach the gateway. To send packets between two different subnets, you need a router in between.

Ok so, I have a question. Does the gateway and DNS addresses have to be the same as my physical router's ip address?

no, you can install your DNS server (if you wish) anywhere you want, and also there are cases when the gateway is not the same as the router, but in small networks these IPs are usually the same.

Does the assignment or did the instructor explain how to configure the VB network? You posted your using NAT but the picture posted shows host only networking. Can post more of the details of your homework assignment? Does your server have two network adapters?

Host only network adapter does not allow traffic outside its internal network. In addition the client VM must be on the same host network as the server. If the client is still configured using DHCP then you need to change the host only DHCP server to match the static work address of your server.

FWIW: if your IP address needs to be fixed and have access external to the host you want your interface to be in BRIDGED mode rather than NAT mode. Network settings then will look much like those on the host, because it is actually bridged to that same network. DHCP address range of the DHCP server but on the same subnet.


Your understanding of the networking needs to be improved. Some reading might be required. This experiment should help with that.

I'll explain to you my assignment. I have to create 2 VMs. One should act as a server and the other one should act as a client. The server's IP address has to be 192.168.101.1/24. On the server VM I have to configure three services: dhcp, dns and ntp. The first thing I tried to do was to set the static ip address of the server. But after I tried this, I had no internet connection so I tried to find the solution on google, youtube, basically everywhere on the internet but I couldn't find any.

From the assignment I assume the server is acting like a gateway for the client if I understand correctly. That means the server needs two network adapters.

The WAN side should be configured as bridge mode, the other internal. The WAN adapter should be configured using DHCP which will provide the DNS and gateway to your LAN. The second adapter will be configured with a static IP address. No gateway or DNS needs to be configured. If the server is running a GUI you can configure a static IP address via the network manager applet.