# Custom port appears in published app URL

**URL:** https://community.baserow.io/t/custom-port-appears-in-published-app-url/11706
**Category:** Uncategorized
**Created:** [December 11, 2025, 1:53pm UTC](https://community.baserow.io/t/custom-port-appears-in-published-app-url/11706 "2025-12-11T13:53:18Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![umbighouse](https://community.baserow.io/letter_avatar_proxy/v4/letter/u/51bf81/32.png) [@umbighouse](https://community.baserow.io/u/umbighouse)
#### Post date: [December 11, 2025, 1:53pm UTC](https://community.baserow.io/t/custom-port-appears-in-published-app-url/11706/1 "2025-12-11T13:53:18Z")

</div>

I setup a self hosted Baserow Docker install. My docker-compose.yml file is shown below.

- I’m using the v2.0.3 all-in-one image
- I use a custom port for Baserow (in this example, 12345)
- This setup sits behind an Nginx Proxy Manager reverse proxy.

I can access Baserow at **[http://192.168.1.xx:12345](http://192.168.1.xx:12345)** fine. The issue I’m having is that when I publish an Application Builder app, it turns the URL into something like this:

**[https://baserowapp.mydomain.com:12345](https://baserowapp.mydomain.com:12345)**

This link doesn’t work. However, if I use **[https://baserowapp.mydomain.com](https://baserowapp.mydomain.com)**, it works fine.

How can I keep Baserow from including the custom port in the published app URL?

**docker-compose.yml**

services:  
baserow:  
container\_name: baserow  
image: baserow/baserow:2.0.3  
environment:  
BASEROW\_PUBLIC\_URL: ‘[http://192.168.1.xx:12345](http://192.168.1.xx:12345)’  
BASEROW\_EXTRA\_ALLOWED\_HOSTS: ‘192.168.1.xx,[http://baserowapp.mydomain.com](http://baserowapp.mydomain.com)’  
ports:  
- “12345:80”  
- “56789:443”  
volumes:  
- baserow\_data:/baserow/data

volumes:  
baserow\_data:

**Nginx Proxy Manager**

 ![NPM_setup](https://community.baserow.io/uploads/default/original/2X/1/14752fa14f268466dfdf75b60a51558db3e41280.png)

 ![NPM_setup_2](https://community.baserow.io/uploads/default/original/2X/4/4bd2f97bc52642a4b6f0f0392f0c3241d3eb1450.png)

ps- I have a **Caddyfile** in the same Docker directory, but not sure if it’s needed. It’s the default one- I didn’t make any changes to it.

> {  
> on\_demand\_tls {  
> ask {$PRIVATE\_BACKEND\_URL:localhost:8000}/api/builder/domains/ask-public-domain-exists/  
> }
> 
> ```auto
> {$BASEROW_CADDY_GLOBAL_CONF}
> 
> ```
> 
> }
> 
> {$BASEROW\_CADDY\_ADDRESSES} {  
> tls {  
> on\_demand  
> }
> 
> ```auto
> @is_baserow_tool {
> expression "{$BASEROW_PUBLIC_URL}".contains({http.request.host})
> }
> 
> handle @is_baserow_tool {
> handle /api/* {
> reverse_proxy {$PRIVATE_BACKEND_URL:localhost:8000}
> }
> 
> handle /ws/* {
> reverse_proxy {$PRIVATE_BACKEND_URL:localhost:8000}
> }
> 
> handle /mcp/* {
> reverse_proxy {$PRIVATE_BACKEND_URL:localhost:8000}
> }
> 
> handle /assistant/* {
> reverse_proxy {$PRIVATE_BACKEND_URL:localhost:8000}
> }
> 
> handle_path /media/* {
> @downloads {
> query dl=*
> }
> header @downloads Content-disposition "attachment; filename={query.dl}"
> 
> # Allow to call head from public url to get size
> header {
> Access-Control-Allow-Origin {$BASEROW_PUBLIC_URL:http://localhost}
> Access-Control-Allow-Methods "GET, HEAD, OPTIONS"
> Access-Control-Allow-Headers "*"
> Access-Control-Expose-Headers "Content-Length, Content-Type"
> }
> 
> file_server {
> root {$MEDIA_ROOT:/baserow/media/}
> }
> }
> 
> handle_path /static/* {
> file_server {
> root {$STATIC_ROOT:/baserow/static/}
> }
> }
> }
> 
> reverse_proxy {$PRIVATE_WEB_FRONTEND_URL:localhost:3000}
> 
> ```
> 
> }

---

<div class="post-metadata">

### Author: ![davide](https://community.baserow.io/user_avatar/community.baserow.io/davide/32/2425_2.png) [@davide](https://community.baserow.io/u/davide)
#### Post date: [December 12, 2025, 12:57pm UTC](https://community.baserow.io/t/custom-port-appears-in-published-app-url/11706/2 "2025-12-12T12:57:16Z")

</div>

Hey @umbighouse,

have you tried setting ` BASEROW_PUBLIC_URL=https://baserowapp.mydomain.com`?

You should be able to find the right settings for your setup here: [Installing Baserow behind Nginx](https://baserow.io/docs/installation%2Finstall-behind-nginx)