On the Gateway$/$Server VM$,$ please set up the following packet filtering rules.

$1.$ Check and set the default iptables policies to DROP for INPUT, OUTPUT, and FORWARD

chains. This setup basically implements a whitelist policy, i$.$e$.,$ only allowing specific network

traffic as $$good$$ traffic to pass through, and thus disable all other non$-$specified traffic. Note

that only allow the required traffic flow and connectivity described in below, and drop all other

network traffic and access.

$2.$ Allow the client to access the web page $($http$)$ on the server by ip address of the

Gateway$/$Server VM$.$ The demo web page should contain the keyword $$Welcome$,$ such as

$$Welcome to the demo and test web page!$$

$3.$ Stop the client from pinging the Gateway$/$Server VM$$s IP address.

$4.$ Allow the client to ping $8\mathrm{.}8\mathrm{.}8\mathrm{.}8($a public IP address on the internet$).$