HTTPS reverse proxy error (Welcome to nginx)

[kriegalex]

So, I've configured Bitbucket & Bamboo using almost the same method and it worked. I'm following this guide: https://confluence.atlassian.com/jirakb/configure-jira-server-to-run-behind-a-nginx-reverse-proxy-426115340.html

Jira is v8.4.  Nginx is 1.10.3 (Debian 9).

What happens on my https://jira.domain.com

My server.xml (8082 for debug purposes):

<Connector port="8080" relaxedPathChars="[]|" relaxedQueryChars="[]|{}^&#x5c;&#x60;&quot;&lt;&gt;"
maxThreads="150" minSpareThreads="25" connectionTimeout="20000" enableLookups="false"
maxHttpHeaderSize="8192" protocol="HTTP/1.1" useBodyEncodingForURI="true" redirectPort="8443"
acceptCount="100" disableUploadTimeout="true" bindOnInit="false" secure="true" scheme="https"
proxyName="jira.domain.com" proxyPort="443"/>

<Connector port="8082" relaxedPathChars="[]|" relaxedQueryChars="[]|{}^&#x5c;&#x60;&quot;&lt;&gt;"
maxThreads="150" minSpareThreads="25" connectionTimeout="20000" enableLookups="false" 
maxHttpHeaderSize="8192" protocol="HTTP/1.1" useBodyEncodingForURI="true" redirectPort="8443" 
acceptCount="100" disableUploadTimeout="true"/>

My nginx.conf is stock and I added jira.conf in the sites-enabled folder of nginx:

server {
  listen 443 ssl;
  # listen [::]:443 ssl;
  server_name jira.domain.com;

  ssl_certificate /etc/letsencrypt/live/jira.domain.com/fullchain.pem; # managed by Certbot
  ssl_certificate_key /etc/letsencrypt/live/jira.domain.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

  # HSTS (ngx_http_headers_module is required) (63072000 seconds)
  # add_header Strict-Transport-Security "max-age=63072000" always;

  location / {
    client_max_body_size 10M;
    proxy_pass http://localhost:8080/;
    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}

# redirect http to https for jira subdomain
server {
  if ($host = jira.domain.com) {
    return 301 https://$host$request_uri;
  }
  listen 80;
  server_name jira.domain.com;
  return 404;
}

I can access Jira through the debug HTTP connector.

[kriegalex · Accepted solution]

sudo rm /etc/nginx/sites-enabled/default
sudo rm /etc/nginx/sites-available/default