traefik reverse-proxy + dns-challenge + basic-auth + whitelist IP

proxy.yml

# place in proxy/config.yml
http:
  middlewares:
    ipwhitelist:
      ipWhiteList:
        sourceRange:
          - "1.2.3.0/24"

    auth:
      basicAuth:
        users:
          - "user:$apr1$..vpaN3N$ziY5nKsRRdbH4xv1PGrRy."
  routers:
    example:
      entryPoints:
        - websecure
      rule: "Host(`vpn.example.com`)"
      service: example
      middlewares:
        - ipwhitelist
        - auth
      tls:
        certResolver: myresolver
  services:
    example:
      loadBalancer:
        servers:
          - url: "http://site.com:3000"

traefik.yml

version: "3.3"

services:

  traefik:
    image: "traefik:v2.11"
    container_name: "traefik"
    restart: unless-stopped
    command:
      - "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.file.directory=/dynamic/"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.websecure.address=:443"
      - "--certificatesresolvers.myresolver.acme.dnschallenge=true"
      - "--certificatesresolvers.myresolver.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.myresolver.acme.email=example@gmail.com"
      - "--certificatesresolvers.myresolver.acme.storage=/letsencrypt/acme.json"
      - "--certificatesResolvers.myresolver.acme.dnsChallenge.resolvers=1.1.1.1:53,1.0.0.1:53"

    ports:
      - "80:80"
      - "443:443"
      - "8080:8080"
    environment:
      - "CLOUDFLARE_EMAIL=example@gmail.com"
      - "CLOUDFLARE_DNS_API_TOKEN=CloudflareAPIToken123"
    volumes:
      - "./letsencrypt:/letsencrypt"
      - "./proxy/:/dynamic/"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"

    networks:
      - shared

  whoami:
    image: "traefik/whoami"
    container_name: "simple-service"
    restart: unless-stopped
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.whoami.tls.domains[0].main=*.vpn.example.com"
      - "traefik.http.routers.whoami.tls.domains[0].sans=vpn.example.com"
      - "traefik.http.routers.whoami.rule=Host(`whoami.vpn.example.com`)"
      - "traefik.http.routers.whoami.entrypoints=websecure"
      - "traefik.http.routers.whoami.tls.certresolver=myresolver"
    networks:
      - shared

networks:
  shared:
    driver: bridge