Sync-in, Onlyoffice, Nginx Proxy Manager

[Nonoss117]

Hello all,

I recently discovered Sync-in, and I like it 👍
I'd like to replace Nexcloud with Sync-in

I'm trying without success to view/Edit documents with Openoffice through NginxProxyMananer with my url: https://sync-in.mydomain.com

Here's my configuration:

I didn't install nginx, I use external url for openoffice.

Sync-in server:
local url: http://192.168.1.100:8888

Environment.yaml:

server:
  # prevent displaying Docker internal IP addresses
  trustProxy: true
mysql:
  url: mysql://root:mypassword@192.168.1.100:3309/sync_in
auth:
  token:
    access:
      secret: mytokenaccess
    refresh:
      secret: mytokenrefresh
applications:
  files:
    dataPath: /app/data
    onlyoffice:
      enabled: true
      secret: myonlyofficejwt
      verifySSL: false
      externalServer: http://192.168.1.100:8092

Onlyoffice
local url: http://192.168.1.100:8092

Nginx Proxy Manager:
https://sinc-in.mydomain.com

When I use local Syn-in url (http://192.168.1.100:8888), everything is working fine. I can edit a word document

I can log, and navigate into Syn-in via https://sync-in.mydomain.com
But when I try to view or edit the world document, I've got the error "Impossible d'ouvrir le document"

This is the onlyoffice nginx.error.log:
192.168.1.32 -> is my windows laptop IP

2025/08/31 11:26:52 [error] 9355#9355: *20 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.1.32, server: , request: "GET /example/ HTTP/1.1", upstream: "http://127.0.0.1:3000/", host: "192.168.1.100:8092", referrer: "http://192.168.1.100:8092/welcome/"

I think something is missing in Nginx Proxy Manager advanced configuration, I spent hours in "googleing" with no success.

Can someone help me ?
Thank's

[lephtHanded]

Here's how I solved it.
I'm not using NPM, (though I used to) I'm using Pangolin. It should still work out the same.
tl;dr:

• create another entry in NPM for open-office (docs.domain.com)
• modify the sync-in environment.yaml to use an external open-office server (docs.domain.com)
• modify the open-office container to require https connections

you can read all about it here in this discussion

edit: the discussion isn't closed.

[Nonoss117]

@lephtHanded , I followed your advices, and it's working now.
Thank's for your help