Traefik 2 docker not showing client real ip - docker

Question

I have traefik running in docker (on a windows host). The problem I have is that the X-Real-IP header alawys shows the docker network gateway ip instead of the real client ip. I'm not sure what I'm doing wrong, I know traefik in host network mode should work, but then it would no longer find the docker services on it's own.
This is my docker compose file:
version: "3.7"
networks:
t2_proxy:
external:
name: t2_proxy
default:
driver: bridge
services:
traefik:
# The official v2 Traefik docker image
image: traefik/traefik:latest
container_name: traefik
restart: unless-stopped
# Enables the web UI and tells Traefik to listen to docker
command: # CLI arguments
- --global.checkNewVersion=true
- --global.sendAnonymousUsage=true
- --entryPoints.https.address=:443
- --api=true
- --api.insecure=true
- --api.dashboard=true
- --log=true
- --log.level=INFO # (Default: error) DEBUG, INFO, WARN, ERROR, FATAL, PANIC
- --accessLog=true
- --accessLog.filePath=/traefiklog/traefik.log
- --accessLog.bufferingSize=100 # Configuring a buffer of 100 lines
- --providers.docker=true
- --providers.docker.defaultrule=Host(`{{ index .Labels "com.docker.compose.service" }}.xxx.com`)
- --providers.docker.endpoint=unix:///var/run/docker.sock
- --providers.docker.exposedByDefault=false
- --providers.docker.network=t2_proxy
- --providers.docker.swarmMode=false
- --providers.file.directory=/rules # Load dynamic configuration from one or more .toml or .yml files in a directory.
- --providers.file.watch=true # Only works on top level files in the rules folder
networks:
t2_proxy:
ipv4_address: 192.168.90.254
ports:
- target: 443
published: 443
protocol: tcp
mode: host
volumes:
- C:\docker/traefik/rules:/rules
- /var/run/docker.sock:/var/run/docker.sock:ro
- C:\docker/traefik/logs:/traefiklog
- C:\docker/shared:/shared
labels:
- "traefik.enable=true"
whoami:
image: "containous/whoami"
container_name: "whoami"
networks:
t2_proxy:
ipv4_address: 192.168.90.200
labels:
- "traefik.enable=true"
- "traefik.http.routers.whoami.rule=Host(`whoami.xxx.com`)"
- "traefik.http.routers.whoami.entrypoints=https"
- "traefik.http.routers.whoami.tls=true"
I set up the network with:
docker network create --gateway 192.168.90.1 --subnet 192.168.90.0/24 t2_proxy
and this is the output of the whoami webrequest in the browser:
Hostname: 8752e7b8a5d4
IP: 127.0.0.1
IP: 192.168.90.200
RemoteAddr: 192.168.90.254:36228
GET / HTTP/1.1
Host: whoami.xxx.com:433
User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US
Cache-Control: max-age=0
Dnt: 1
Te: trailers
Upgrade-Insecure-Requests: 1
X-Forwarded-For: 192.168.90.1
X-Forwarded-Host: whoami.xxx.com:433
X-Forwarded-Port: 433
X-Forwarded-Proto: https
X-Forwarded-Server: 969f601c0c24
X-Real-Ip: 192.168.90.1

Answer 1

The solution seems to be presented in this guide: https://dockerswarm.rocks/traefik/#getting-the-client-ip
If you need to read the client IP in your applications/stacks using the X-Forwarded-For or X-Real-IP headers provided by Traefik, you need to make Traefik listen directly, not through Docker Swarm mode, even while being deployed with Docker Swarm mode.
ports:
- target: 80
published: 80
mode: host
- target: 443
published: 443
mode: host