nginx as a reverse proxy on port 3000 fails

Question

I have a domain (example.com ), and have followed every step (I think I have atleast) of the nodjs tutorial on digitalocean (https://www.digitalocean.com/community/tutorials/how-to-set-up-a-node-js-application-for-production-on-ubuntu-20-04 ) So, if I load up http://my_server_ip, I get the welcome to nginx screen. If I load up my domain (example.com ), the screen shows the sample html from the server nginx server blocks tutorial If I load up my_server_ip:3000, nothing happens, even though localhost:3000 shows Hello World, from the node tutorial My reverse proxy settings in the sites-available folder is as follows: server { root /var/www/example.com/html; index index.html index.htm index.nginx-debian.html; server_name example.com www.example.com; location / { try_files $uri $uri/ =404; } listen [::]:443 ssl ipv6only=on; # managed by Certbot listen 443 ssl; # managed by Certbot ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot } server { if ($host = www.example.com) { return 301 https://$host$request_uri; } # managed by Certbot if ($host = example.com) { return 301 https://$host$request_uri; } # managed by Certbot listen 80; listen [::]:80; server_name example.com www.example.com; return 404; # managed by Certbot } server { location / { proxy_pass http://localhost:3000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; } } The check of the nginx files shows no errors, but I still cant see the hello world from outside the server. Can anyone point me in the right direction?

Bobby Iliev · Accepted Answer

Hi there @nah84 , I believe that you need to move the reverse proxy rule into the server block that handles the 443/HTTPS traffic like this: server { root /var/www/example.com/html; index index.html index.htm index.nginx-debian.html; server_name example.com www.example.com; location / { try_files $uri $uri/ =404; } listen [::]:443 ssl ipv6only=on; # managed by Certbot listen 443 ssl; # managed by Certbot ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot location / { proxy_pass http://localhost:3000; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; proxy_set_header Host $host; proxy_cache_bypass $http_upgrade; } } server { if ($host = www.example.com) { return 301 https://$host$request_uri; } # managed by Certbot if ($host = example.com) { return 301 https://$host$request_uri; } # managed by Certbot listen 80; listen [::]:80; server_name example.com www.example.com; return 404; # managed by Certbot } Then run an Nginx test again with: sudo nginx -t And if you get Syntax OK restart Nginx: sudo systemctl restart nginx If this is still not working, make sure that your Node application is actually listening on port 3000. You can check that with the following command: netstat -plant If the application is listening on a different port you would need to adjust this accordingly in your proxy configuration. Let me know how it goes!Regards,Bobby

Question

nginx as a reverse proxy on port 3000 fails

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