Cannot pass host header

[john199604]

Hello,

I have a .NET Core API and Angular 5 app which i am using traefik for the requests to go throught.

Here's my traefik.toml

debug = false
defaultEntryPoints = ["http", "https"]
[entryPoints]
   [entryPoints.http]
   address = ":80"
   [entryPoints.https]
   address = ":443"
     [entryPoints.https.tls]
       [[entryPoints.https.tls.certificates]]
       CertFile = "/etc//ssl/cert.pem"
       KeyFile = "/etc/ssl/key.pem"
[web]
ReadOnly = true
[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "docker.localhost"
watch = true

My docker-compose file looks like this:

version: '2'

services:
  servercore:
    build: ./ServerCore
    restart: unless-stopped
    environment:
      DisplayName: ${DisplayName}
    labels:
      - traefik.backend=servercore
      - traefik.frontend.rule=Host:servercore.docker.localhost

  angular:
    build: ../actibook-frontend
    restart: unless-stopped
    labels:
      - traefik.backend=angular
      - traefik.frontend.rule=PathPrefix:/
      - traefik.enable=true
      - traefik.port=4200
      - traefik.frontend.passHostHeader=true
      - traefik.frontend.headers.customRequestHeaders=Host:servercore.docker.localhost

  traefik:
    build: ./traefik
    ports:
      - "80:80"
      - "443:443"
      - "8000:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: unless-stopped

But when I am adding "Host" header to requests when sending from Angular to Servercore it shows me this error:

Refused to set unsafe header "Host"

Shouldnt traefik.frontend.passHostHeader=true or traefik.frontend.headers.customRequestHeaders=Host:servercore.docker.localhost make that possible?

Thank you.

[juliens]

Thanks for your interest in the project.

The message Refused to set unsafe header "Host" is not a Traefik problem. It's a security message from your browser. You can not change the Host header in an ajax request.

If you have questions and need community support, you can join our Slack workspace and reach out to us on the #support channel.