firefox sync server behind reverse proxy

[mlause]

I posted this on the mozilla forum, but hopefully I can get a faster response here.

I'm hosting this on unraid as a docker. If I set sync server up on the local network, it works. I use this public address in the docker container http://localhost:5000 and the about:config server as identity.sync.tokenserver.uri = http://localhost:5000/token/1.0/sync/1.5.

Now if I switch to my reverse proxy (swag), I use this public address in the docker container http://firefox.mydomain.com/ and the about:config server as identity.sync.tokenserver.uri = http://firefox.mydomain.com:5000/token/1.0/sync/1.5. It does not sync. I get an error if I use that url in the browser link. If I make it http://firefox.mydomain.com/token/1.0/sync/1.5 (taking out the port number), my browser displays a json page. But if I remove the port number in the about:config and make it identity.sync.tokenserver.uri = http://firefox.mydomain.com/token/1.0/sync/1.5, it logs me out of my firefox account. It says the account is disconnected requiring me to login. If I do, I get booted out again.

The reverse proxy is passing through port 5000, so that is why not specifying it returns a valid browser page. The about:config seems to need the port specified to work. Otherwise I'm getting logged off. Is there a workaround to this?

[meichthys]

It works for me using the url without the port number in the about:config and with the following docker compose:

version: '3.7'
services:
  syncserver:
    container_name: firefox_syncserver
    image: mozilla/syncserver:latest
    volumes:
      - data:/data
    ports:
      - 5000:5000
    environment:
      SYNCSERVER_PUBLIC_URL: 'https://firefoxsyncserver.mydomain.com'
      SYNCSERVER_SECRET: 'your secret here'
      SYNCSERVER_SQLURI: 'sqlite:////data/syncserver.db'
      SYNCSERVER_BATCH_UPLOAD_ENABLED: 'true'
      SYNCSERVER_FORCE_WSGI_ENVIRON: 'true'
      PORT: '5000'
    restart: always
    networks:
      - firefoxsyncserver
      
networks:
  firefoxsyncserver:
  
volumes:
  data: