ID: 

Task1
Rule1: iptables -A ...
node1-to-node4: allowed
node4-to-node1: blocked 
node1-to-node3: ...
node3-to-node1:
node1-to-node2:
Rule2: iptables -A ...
node1-to-node4:
node4-to-node1:
node1-to-node3:
node3-to-node1:
node1-to-node2:
Rule3:
node1-to-node4:
node4-to-node1:
node1-to-node3:
node3-to-node1:
node1-to-node2:
Explain-difference-between-chains:
write your answer here

Task2
Rule4: 
Explain-TCP-retransmissions-and-interval:

Task3
Rule5: 
http-messages:

Task5
Rule6:
Rule7: