Thingspeak behind reverse proxy

Thank you for making thingspeak! Accessing my thingspeak server via the internet gives me some problems:

• I cannot access port 3000 or other "unusual" port.
• I want to access thingspeak via https.
  Configuring Apache as a reverse proxy would solve the problems. Unfortunately the charts are not shown. It only shows /dev-assets/ajax-loader.gif. Where is the point it breaks?
  Thank you for your advice!
  Happy new year,
  Franz

[fuco809]

i use nginx for that with a config like this example without ssl:

server {
listen 80 default_server;
listen [::]:80 default_server;
root /var/www/html;
index index.html index.htm;
server_name YourServer.Name.Com;
location / {
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_set_header X-Forwarded-Proto $scheme;
# Fix the “It appears that your reverse proxy set up is broken" error.
proxy_pass http://localhost:3000;
proxy_read_timeout 90;
proxy_redirect http://localhost:3000 https://YourServer.Name.Com;
}
}

based on:
https://www.digitalocean.com/community/tutorials/how-to-configure-nginx-with-ssl-as-a-reverse-proxy-for-jenkins

Thank you, fuco809, for your reply. I forgot about this threat, my threat ...

Some day, I got it to work with Apache. This is the virtual host config:

<IfModule mod_ssl.c>
<VirtualHost *:443>
## SSL specific settings stripped ##
# I had to modify some some lines of my default config for other virtual hosts:
Header always unset Content-Security-Policy
Header always set Content-Security-Policy "upgrade-insecure-requests"
# This line unsets X-Content-Type-Options: nosniff in my default config for other virtual hosts, this may be the key line:
Header always unset X-Content-Type-Options
# Maybe this line is not nessecary (any more?):
#Header always unset Strict-Transport-Security
ServerAdmin webmaster@example.com
ServerName thingspeak.example.com
### ReverseProxy ###
	ProxyRequests Off
	ProxyHTMLExtended On
        ProxyPass / http://localhost:3000/ timeout=180 retry=1 acquire=3000 Keepalive=On
        ProxyPassReverse / http://localhost:3000/
        ProxyHTMLURLMap http://localhost:3000/ /
        SetOutputFilter proxy-html
        RequestHeader unset Accept-Encoding
        ProxyPreserveHost On
### Ende ReverseProxy ###
</VirtualHost>
</IfModule>