We shall assume we have a static IP from the ISP and that all unsolicited
packets (default) should be directed to just one machine.
The request-response packets should still be routed to the machines
where the request originates.
These two types of packets are diagramed below. I think a solution
to this has general importance as proxy, firewall, and many software
requires a specific and static IP that are not NAT assigned. So there shoud
be a work-around.
(1) Unsolicited
Originator (456.456.456.456)
V
ISP assigned static IP (123.123.123.123)
V
Transfer to P75 (200.200.200.200)
V
A machine to handle unsolicited packets (200.200.200.201)
that will run say Proxy Server, Firewall, and Exchange Server, etc.
(2) Solicited (or Request-Response type)
User (200.200.200.102) Requests Webpage
V
Goes out via the P75 default gateway (200.200.200.200)
V
Which is mapped to ISP's static IP (123.123.123.123)
V
The rerouted to the Website (234.234.234.234)
V
Response goes back to ISP (...123) > P75 (...200) > Machine
Thanks.
Edwin
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