iptables -F iptables -X iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -P FORWARD DROP iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -i eth1 -s 192.168.7.0/24 -j ACCEPT iptables -A INPUT -i eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT

iptables -A FORWARD -i eth1 -s 192.168.7.0/24 -m state --state NEW -j ACCEPT iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables -t nat -F iptables -t nat -X iptables -t nat -A POSTROUTING -o eth0 -s 192.168.7.0/24 \ -j SNAT --to-source 200.84.197.71

Explain the general purpose of the firewall above. Your explanation should include a description of the networks the gate- way machine is connected to and how it is connected. Note: this is a general description do not make any explicit reference to the commands above.