How does VirtualBox modify the IP network segment assigned to the virtual machine in the "network address translation (NAT)" network mode

stay NAT In mode , Assigned to the virtual machine IP Address defaults to 10.0.x.0/24. among x Is the network card number +1, For example 1 The network card is enabled NAT Pattern , Is assigned to the virtual machine by default IP The address is 10.0.2.15, Gateway is 10.0.2.2.

If you need to modify the default network segment , You can use the following command ：

cd "C:\Program Files\Oracle\VirtualBox"

.\VBoxManage.exe list vms
"k8s-master" {bdd664c6-4292-4c05-89ff-c09219bf0bfa}
"k8s-worker1" {6e83cf63-597b-4c03-8836-11311deb04ac}
"k8s-worker2" {8b2e1124-84fc-47a6-8466-e6adc57bf82e}
"k8s-worker3" {b2fd6bc9-01c0-4873-bd87-ca9183de6edd}

# modify k8s-worker3 Of the first network card NAT Subnet segment 
.\VBoxManage modifyvm "k8s-worker3" --natnet1 "172.0.0.0/24"

# modify k8s-worker3 Of the second network card NAT Subnet segment , And so on 
.\VBoxManage modifyvm "k8s-worker3" --natnet2 "172.0.0.0/24"

Restart the virtual machine after modification , You can see that the network card address has changed to the network segment we defined ：

enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.0.0.15  netmask 255.255.255.0  broadcast 172.0.0.255
        inet6 fe80::8758:99e2:303e:7f4  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:af:ed:37  txqueuelen 1000  (Ethernet)
        RX packets 130  bytes 13622 (13.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 162  bytes 20843 (20.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Reset to the default value if necessary , Then specify the network segment again as default that will do ：

.\VBoxManage modifyvm "k8s-worker3" --natnet1 default

.\VBoxManage modifyvm "k8s-worker3" --natnet2 default