Network Configuration

1. Wireless Network

• Desktop System

  Connect to Wi-Fi using the Wi-Fi management tool in the upper right corner of the menu bar, as shown in the figure below. Click the target Wi-Fi name, then enter the Wi-Fi password in the pop-up dialog box.

• Command Line

Wireless network configuration can be done via the command line, following the steps below:

sudo nmcli device wifi rescan # Scan for Wi-Fi networks
sudo nmcli device wifi list # List detected Wi-Fi networks

Run the following command to connect to the specified Wi-Fi network.

xxxxxxxxxx
sudo wifi_connect "SSID" "PASSWD" 

The message "successfully activated" in the terminal indicates a successful Wi-Fi connection. If a message indicating the access point cannot be found appears after attempting to connect, run the command sudo nmcli device wifi rescan to rescan for Wi-Fi networks and retry the connection.

xxxxxxxxxx
root@ubuntu:~# sudo wifi_connect "WiFi-Test" "12345678" 
Error: No network with SSID 'WiFi-Test' found.

2. Wired Network

Network configuration via Netplan has only been validated on RDK S100 / RDK S600 and is not supported on other platforms temporarily.

• The RDK S600 root file system is built on Ubuntu-24.04 and does not support enabling or disabling network interfaces using ifup/ifdown by default.
• Static IP and Subnet Mask: To set a static IP address and subnet mask for a network interface, use the addresses field with the CIDR notation for the subnet mask.
• DHCP Configuration: To enable automatic IP address assignment via DHCP (Dynamic Host Configuration Protocol) for a specified network interface, set the dhcp4 or dhcp6 field value to yes.
• Custom MAC Address: Use the macaddress field to assign a custom MAC address to the network interface.
• Custom DNS Address: Use the nameservers field to specify custom DNS addresses for the network interface.

An example of network configuration using Netplan is shown below:

xxxxxxxxxx
sudo vim /etc/netplan/99-hobot-net.yaml

xxxxxxxxxx
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    eth0:
      dhcp4: yes
      dhcp6: yes
      nameservers:
        addresses: [10.9.1.2, 8.8.8.8, 8.8.4.4]
    eth1:
      addresses:
        - 192.168.127.10/24
      nameservers:
        addresses: [10.9.1.2, 8.8.8.8, 8.8.4.4]

After making changes, run sudo netplan apply to apply the configuration.

3.DNS Service

DNS (Domain Name Server) is a server that translates domain names into their corresponding IP addresses.

The DNS configuration of the development board is managed through the /etc/systemd/resolved.conf file. Users can modify this file to complete DNS-related configurations as follows:

1. Edit the resolved.conf file and add the DNS server address, for example:

   xxxxxxxxxx
   DNS=8.8.8.8 114.114.114.114
   

2. Apply the DNS configuration using the following commands:

   xxxxxxxxxx
   sudo systemctl restart systemd-resolved
   sudo systemctl enable systemd-resolved
   sudo mv /etc/resolv.conf  /etc/resolv.conf.bak
   sudo ln -s /run/systemd/resolve/resolv.conf /etc/
   

4.Proxy Configuration

Proxy configuration refers to setting up a network proxy. In network communication, a proxy server acts as an intermediary between the client and the target server. The client's request is first sent to the proxy server, which then forwards it to the target server. The target server's response is also returned to the client through the proxy server.

Edit the ~/.bashrc or /etc/environment file. If configuring the proxy for the current user, edit ~/.bashrc; if configuring the proxy for all users, edit /etc/environment.

Add the following content to the file (using HTTP proxy as an example):

xxxxxxxxxx
http_proxy=http://proxy_server_address:port
https_proxy=http://proxy_server_address:port
ftp_proxy=http://proxy_server_address:port
no_proxy=localhost,127.0.0.1

After saving the file, run the following command to apply the configuration:

xxxxxxxxxx
source ~/.bashrc