How to access nginx server from outside using specific port (4430)

[lou1]

Hello,

I’m trying to deploy a Flask app using nginx server. This server is hosted on one of my computers with an ubuntu system and using my internet connexion.

I managed to deploy the app and access it via my local network but not with others network. In order to do so, I tried to configure my box to allow remote access which is possible only through the port 4430.

Therefore I can pass the following test with success (using the port 4430): https://canyouseeme.org/

My nginx configuration is the following one:

server {
    listen 80;
     listen [::]:80;
root /var/www/domain.app/html;
index index.html index.htm index.nginx-debian.html;

server_name domain.app www.domain.app;

location / {
        try_files $uri $uri/ =404;
}

}

The app is still not accessible from others network when trying domain.app:4430 and I’m a bit confused about the manipulation needed in order to solve this issue.

I tried to change the nginx configuration file with port 4430 instead of 80 -> not working
I get “your connexion is not secure … NET_CERT_AUTHORITHY_INVALID”

I also tried to add a Self-signed SSL Certificate for Nginx using the following command:
sudo certbot --nginx -d domain.app -d www.domain.app

but I then get: “Timeout during connect (likely firewall problem)”

I’m quite new to that topic and any help would be very appreciated.

[JuergenAuer]

Hi @lou1

@lou1

Therefore I can pass the following test with success (using the port 4430): https://canyouseeme.org/

to validate your domain using http validation, a working port 80 is required. Perhaps with a redirect to another port 80 or 443, no other port.

Please start with some basics.

How It Works - Let's Encrypt

Then read something about challenge types:

Challenge Types - Let's Encrypt

That

@lou1

I also tried to add a Self-signed SSL Certificate for Nginx using the following command:
sudo certbot --nginx -d domain.app -d www.domain.app

doesn't create a self signed certificate.

[Osiris]

@lou1 I’m not so sure from your story what the actual issue is here. Do you have trouble getting a Let’s Encrypt certificate? Or are you having trouble with installing a Let’s Encrypt certificate? Or is it more a “general” “how do I get nginx to work on another port” issue? Or perhaps a “how do I get my Flask app to do something” issue? Note: the latter two issues aren’t really issues discussed here on this forum if it doesn’t involve Let’s Encrypt. At least not in the “Help” section.