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→Building a Simple Firewall
#Disable your current firewall. i.e. flush all rules in all chains in all tables.
===Now build a custom firewall by performing the following steps:===
#Add appropriate rule(s) to allow all traffic to/from the loopback 'lo' interface.
#Add a rule to the INPUT chain of the filter table to send ICMP ping packets to your MYICMP chain.
#Change the default policy on the INPUT chain in the filter table to DROP.
#Use nmap to scan your firewall from 142.204.141.XXX. If you don't have nmap on your system then install it.#Use ping and ssh from 142.204.141.XXX (and elsewhere) to verify your firewall is working properly. Be sure to check the log file for your unsuccessful ssh attempts. #Use iptables-save command to save your firewall rules.
Part B: Answer the following questions
