private IPv4 address of the web server.
• NAT rule 2 performs further translation of HTTP traffic arriving from internal clients so it has
wan_ip as the source before forwarding it to the web server.
• Allow rule 3 allows traffic from the Internet to reach the web server after it has been
translated by the SAT rule. This traffic will not trigger the preceding NAT rule.
• NAT rule 4 performs NAT translation of HTTP traffic flowing from internal clients out onto the
Internet.
Chapter 7: Address Translation
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