Inside-to-Outside Translation

Inside-to-outside translation occurs in the following order:

1. Inside (privately addressed) traffic enters the router on an interface marked as inside.
2. A route lookup is performed.
3. If the next interface is marked as outside, the router sends the traffic to the server module.
4. The server module performs the appropriate translation.
5. The router forwards the packet to the appropriate egress line module.
6. The line module sends the packet as outbound traffic using a globally unique source address (inside source translation), destination address (outside source translation), and ports (NAPT).

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