Nginx – Reverse-proxied nginx exposing port number when redirecting directory index requests

nginx

I have nginx backend that's used to serve static files. Nginx is running on a non-standard port (e.g. 8080). It is publicly accessible via a reverse proxy on port 80.

The setup works fine for the most part. However, if a request is made to a directory, nginx returns a 301 redirect with the port set to 8080.

All the questions I could find were about nginx being a reverse proxy rather than the actual server. Any help would be very much appreciated!

As an illestration of this problem, the URL http://example.com/dir/ works fine. But leaving the trailing slash http://example.com/dir causes the browser to redirect to http://example.com:8080/dir.

Best Answer

There is port_in_redirect directive for this. You should turn it off.

server {
    ...
    port_in_redirect off;
    ...
}

Also, it's better to test redirects (especially permanent redirects) with console tools like curl or wget, because your browser is likely already cached redirect and will just use it without actual hit to the server (that's the main reason of permanent redirect).

Related Solutions

NGINX Reverse Proxy – URL Rewrite

Any redirect to localhost doesn't make sense from a remote system (e.g. client's Web browser). So the rewrite flags permanent (301) or redirect (302) are not usable in your case.

Please try following setup using a transparent rewrite rule:

location  /foo {
  rewrite /foo/(.*) /$1  break;
  proxy_pass         http://localhost:3200;
  proxy_redirect     off;
  proxy_set_header   Host $host;
}

Use curl -i to test your rewrites. A very subtle change to the rule can cause nginx to perform a redirect.

Nginx – Stop nginx reverse proxy from redirecting

After some fumbling around with the nginx documentation, I found a setting for proxy_redirect which solves the issue.

location / {
    proxy_pass http://gaiatest1;
    proxy_redirect http://$proxy_host:9001 http://$host:80;
}

Best Answer

Related Solutions

NGINX Reverse Proxy – URL Rewrite

Nginx – Stop nginx reverse proxy from redirecting

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