VMbox中Ubuntu的Host-Only与NAT网络故障：配置文件是否异常？

Hey there, it seems you didn’t include the actual content of your network interface configuration file in your question! Without seeing that specific setup, it’s tricky to pinpoint exact issues, but let’s go through common troubleshooting steps and what a working NAT config usually looks like.

Common Checks to Start With #

• VirtualBox Global NAT Settings
  Head to VirtualBox → File → Tools → Network Manager. Make sure:

  • The NAT network (default is NatNetwork) exists and has a valid subnet (e.g., 10.0.2.0/24)
  • DHCP is enabled for the network (this is default, but sometimes gets toggled off accidentally)

• VM Adapter Configuration
  In your Ubuntu VM’s settings:

  • Go to Network → Select the adapter set to NAT
  • Confirm it’s attached to NAT (not "NAT Network" if you’re using basic NAT mode)
  • Ensure the "Cable Connected" box is checked

Working NAT Config Examples #

Depending on your Ubuntu version, network configs live in different places:

Ubuntu 18.04+ (Netplan, /etc/netplan/*.yaml) #

A standard DHCP-enabled NAT config should look like this:

network:
  ethernets:
    enp0s3:  # Replace with your actual NAT interface name (check via `ip addr`)
      dhcp4: true
  version: 2

Apply changes with sudo netplan apply.

Older Ubuntu ( /etc/network/interfaces ) #

auto enp0s3
iface enp0s3 inet dhcp

Restart networking with sudo systemctl restart networking.

Quick Connectivity Tests #

• Run ip addr to check if your NAT interface has an IP in the expected subnet (e.g., 10.0.2.x)
• Ping a public IP like 8.8.8.8 — if this works but domain names don’t, it’s a DNS issue
• Check DNS settings with cat /etc/resolv.conf; valid entries could be 8.8.8.8 or your host’s DNS server

Once you share your actual configuration file, I can help spot any specific misconfigurations!

内容的提问来源于stack exchange，提问作者the_train