Windows VM: Win-key + R - ncpa.cpl Edit the VMnet interface, disbale IPv6 and double click on IPv4 Configure static IP, netmask. Configure the Default-Gateway and DNS to be the IP of the REmnux INetSim VM. REmnux-INetSim VM: 1. Run sudo -s 2. apt update && apt upgrade -y 3. apt install ifupdown net-tools 4. nano /etc/network/interfaces: auto iface inet dhcp auto iface inet static address netmask 5. Run accept-all-ips start 6. Configure IP forwarding with the following commands: echo 1 > /proc/sys/net/ipv4/ip_forward In the /etc/sysctl.conf file, uncomment the following line: net.ipv4.ip_forward = 1 7. Run the following IPtables commands: iptables -t nat -A POSTROUTING -o -j MASQUERADE iptables -A FORWARD -i -o -j ACCEPT