Does the server application need to know the client's real IP?

Question

Software and Internet Services

PS:

Couldn't find a tag to put it in.

Due to the peculiarities of routing and NAT in my network, the end server application does not see the real IP address of the client, but sees the address of the intermediate gateway as the incoming IP address.
How often is this scheme used? Should the server know the client's IP address? The network has a firewall.

Answer 1

So in most cases, the server does not see the client's real IP .. but sees the gateway ...

Answer 2

Everything depends on your requirements. If the server needs a real api then nothing. For example, to account for traffic. And so in general, a real api is not needed