# Install arp-can tool
sudo apt install arp-scan
# Scan all your local netwrok
sudo arp-scan -l
# Scan another network
sudo arp-scan 192.168.2.1/24
# Install masscan tool
sudo apt install masscan
# Scan with Syn packages
masscan MACHINE_IP/24 -p80,443
# Dumping ICMP packages from VPN interface
sudo tcpdump ip proto \\icmp -i tun0