how to install cuckoo sandbox
very good tuturial https://utopianknight.com/malware/cuckoo-installation-on-ubuntu-20/ *pay attention on step 85: replace eth0 to your primary adaptor name (you can get it by Ifconfig) sudo iptables -A FORWARD -o eth0 -i vboxnet0 -s 192.168.56.0/24 -m conntrack --ctstate NEW -j ACCEPT then sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT then sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE