Networking
There are various tools available for managing network settings and connections. Some common tasks related to networking include:
Managing network connections:
You can use the nmcli (Network Manager CLI) utility to manage network connections. It
allows to configure the network settings for various types of connections, such as Ethernet, WiFi,
and VPN.
nmcli connection show
# or if the device is not known
nmcli dev wifi list
To connect to one of the listed networks run:
nmcli device wifi connect "Your SSID" password "network-password"
Viewing networks statistic:
Network interfaces are the physical or logical connections that allow a device to communicate with other devices on a network.
You can use the ifconfig utility to view network interfaces, while with the netstat command you can view the network
statistics, such as the number of packets sent and received.
Debugging network issues:
If you encounter any issues with your network connections, you can use the ping, traceroute, and mtr commands
to troubleshoot the problem. These commands allow you to test the connectivity and performance of a network connection.
IP Address
An IP address is a unique numerical label assigned to every device connected to a network, for being identified.
Private
192.168.0.0 is the beginning of the private IP address range (that includes all IP addresses through 192.168.255.255)
assigned by . One common IP address assigned to home routers is 192.168.1.1. This IP address is used because the router is on the
192.168.1.0 network. In the same way, routers on the 192.168.0.0 network are usually assigned the local, private IP address of 192.168.0.1.
To find out your private IP address, run:
ip route get 1.1.1.1 | awk '{print $7}'
If you are interested into visualize the private IP addresses of your network run:
nmap -sP 192.168.1.0/24
To return a panoramic of the system you want to investigate
nmap -sT -O <private_IP_address>
An address like 192.168.0.0 becomes unusable for any other purpose after it's established as a network number. If an administrator assigns 192.168.0.0 to any device on the network as a static IP address, the network stops functioning until that device is taken offline.
Local IP address
localhost is the default name of the computer you are working on. The term is a pseudo name for the
IP address127.0.0.1. This IP address allows the machine to connect to and communicate with itself.
Therefore, localhost (127.0.0.1) is used to establish an IP connection to the same device used by the end-user.
Although using 127.0.0.1 is the most common practice, the IPv4 network standard reserves the range 127.0.0.1
– 127.255.255.255 for localhost. Using another IP address within the range results in the same or similar manner.
The IPv6 standard assigns one address to loopback - :: 1.
Public
A public IP address is a unique numerical label assigned to every device connected to the Internet. It allows devices to communicate with each other and with servers over the Internet. Your public IP address is the address that is assigned to your device by your Internet Service Provider (ISP) and is used to identify your device on the Internet. It is a unique identifier for your device, similar to your home address, and is used to route traffic to your device from other devices on the Internet.
You can find out your public IP address by using:
curl ifconfig.co
The public IP address can change over time, especially if you have a dynamic IP address assignment from your Internet Service Provider (ISP). If you have a dynamic IP address, it may change every time you connect to the Internet or after a certain period of time. If you have a static IP address, it will remain the same unless you change it manually or through your ISP.