Sunday, March 28, 2021

Need some clarification on NAT?

The definitions are very convoluted and I THINK I have a decent grasp on what these all mean, can someone verify that my understanding is correct? Or if i'm totally off pleaseeee let me know lol

Inside global: The PUBLIC IP address as seen by other networks (if you're the host that is translating to a destination network - it would be the IP associated with your networks router?)

Inside local: The PRIVATE IP ADDRESS as seen by others on the network you're translating from (it's your PRIVATE IP address, but to other networks it is a public IP?)

Outside local: The PUBLIC IP address as seen by the network that is translating to this one (this is a HOST IP address?, meaning the opposite of inside local - a private IP to that host but it is PUBLIC to other networks)

Outside global: The PUBLIC IP address of the network you're translating to (This is the destination networks router?)

So in summary?

Inside global - Public IP - the router of the source network

Inside local - Private IP - the host that is sending the packet

Outside local - Public IP - the host that is receiving the packet

Outside global - Public IP - the router of the destination network

Sorry if this is a mess of a post. I'm trying to get this concept down before I sit for CCNA



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