Nginx proxy server to another proxy server Gateway timeout - django

Question

It's my first time deploying an application on a deployment environment so I am a complete beginner at this, I have an nginx proxy server (call it server1) on an instance with an exposed IP to the internet & it routes requests to another server on a different instance (call it server2) that hosts my Django application, the conf file for server1 goes like this :
`server{
server_name _;
location / {
proxy_pass_header Authorization;
proxy_pass http://10.156.0.4:80;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Connection “”;
proxy_buffering off;
client_max_body_size 0;
proxy_read_timeout 36000s;
proxy_redirect off;
}
listen 443 ssl;
listen [::]:443 ssl;
include snippets/self-signed.conf;
include snippets/ssl-params.conf; }
server{
listen 80;
listen [::]:80;
server_name _;
return 302 https://35.246.244.220;}
and the second server:
server{
listen 80;
listen [::]:80;
server_name _;
location / {
proxy_pass_header Authorization;
proxy_pass http://10.156.0.4:8880;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Connection “”;
proxy_buffering off;
client_max_body_size 0;
proxy_read_timeout 36000s;
proxy_redirect off;
}
location /static/ {
alias /opt/app/mydjangoapp/staticfiles/;
autoindex off; }
}
I am running my django application using this command python manage.py runserver 0.0.0.0:8880 & I also did collectstatic before running the application.
Everything works fine when i edit proxy_pass in server1 to http://10.156.0.4:8880 directly but i needed the second nginx server so i can serve the static files for my application.
I feel like I am doing something obviously wrong here, but for the life of me i can't figure it out.

Answer 1

I figured out the problem, there was a firewall rule between those two instances that didn't allow ingress or egress from port 80, only port 8880. Didn't think of this at all!