In the logs of Nginx running in a Docker container, IP gateway is displayed. Is it possible to force to display the real IP of the client?

Question

Windows

Hello.
I have a Windows-10 machine running Docker. The container is running Nginx.
The Nginx logs contain something like this:

172.17.0.1 "GET / HTTP/1.1" 200 20/Jan/2021:10:30:19 +0200 Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:84.0) Gecko/20100101 Firefox/84.0 "-"

172.17.0.1 is the gateway.

docker network inspection bridge

[
    {
        "Name": "bridge",
        "Id": "5851bc62c8ca9969ca6dec48574d7bcb9e503dee5f7130e31fb83985b142e6c6",
        "Created": "2021-01-19T20:13:53.9892753Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "172.17.0.0/16",
                    "Gateway": "172.17.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "d2da953e9a9e8bb7b6e835255c3a7b5fc3b1018fd5c3d2cedd31de4c9d1c15dd": {
                "Name": "frontend",
                "EndpointID": "2cba04a0774fec12a49fd78cf1f41c543b15d625135fe4a0f4481dc093bd8b9f",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            }
        },
        "Options": {
            "com.docker.network.bridge.default_bridge": "true",
            "com.docker.network.bridge.enable_icc": "true",
            "com.docker.network.bridge.enable_ip_masquerade": "true",
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
            "com.docker.network.bridge.name": "docker0",
            "com.docker.network.driver.mtu": "1500"
        },
        "Labels": {}
    }
]

Is there any way to "see" the real IP of the client?

Thank you.

Answer 1

Add to nginx config:

real_ip_header X-Forwarded-For;
set_real_ip_from 0.0.0.0/0;