Meteor App and Nginx on Port 80 - node.js

Question

My site shows always a blank page when I run Nginx on port 80. However if I run Nginx on an other port e.g. port 8080 and I go to mypage.com:8080 it shows my Meteor App. I have no idea why Nginx work on all ports but 80.
Here are my configs.
Nginx
server {
listen *:80 default_server;
server_name mypage.de;
access_log /var/log/nginx/app.dev.access.log;
error_log /var/log/nginx/app.dev.error.log;
location / {
proxy_pass http://127.0.0.1:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header X-Forwarded-For $remote_addr;
}
}
Meteor App started with
sudo PORT=5000 MONGO_URL=mongodb://user:pwd#127.0.0.1:27017/mypage
ROOT_URL=http://mypage.de forever start -a -o out.log -e err.log main.js
netstat -tulpn shows
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 11214/nginx -g daem
tcp 0 0 0.0.0.0:5000 0.0.0.0:* LISTEN 10853/node
but as I said before mypage.de shows blank page... The same configs with Nginx on Port 8080 works. I working on Ubuntu. How can I fix this?

Answer 1

Your IP Tables seem to be blocking port 80. That or a firewall in between you and your server.
These are the IP Table rules for web traffic. Just run these commands on the command line:
iptables -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
I would also drop any rules that aren't needed like allowing port 5000. You only want people going to the web ports and that's it.