Networking

DHCP Client

Install the ISC-DHCP client package:

sudo pacman -S dhclient

Wireless Configuration

Basic wireless

For basic wireless configuration, the package wifi-menu can be installed. It is extremely primitive and basic but better than absolutely no network capability.

Drivers

For Intel wireless devices, ex. 7260 etc.

sudo pacman -S firmware-iwlwifi

Network Management

NetworkManager

Install NetworkManager

sudo pacman -S networkmanager networkmanager-openvpn network-manager-applet

Set the service to start automatically

sudo systemctl enable NetworkManager
sudo systemctl start NetworkManager

Firewall

Install the "uncomplicated firewall"

sudo pacman -S ufw

Configure it with "sane defaults"

sudo ufw default-deny 
sudo ufw limit ssh
sudo ufw enable

It will now automatically start on boot.