====== Reverse Proxy - NGINX Reverse Proxy - Passing Request Headers ======

By default, NGINX modifies two header fields in proxied requests, “Host” and “Connection”, and eliminates the header fields whose values are empty strings.

  * “Host” is set to the value of the **$proxy_host** variable, and
  * “Connection” is set to close.

To change these settings, as well as modify other header fields, use the **proxy_set_header** directive.

  * This directive can be specified in a location or higher.
  * It can also be specified in a particular server context or in the http block. 
 
For example:

<code>
location /some/path/ {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_pass http://localhost:8000;
}
</code>

<WRAP info>
**NOTE:**  In this configuration the “Host” field is set to the $host variable.
</WRAP>

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===== To prevent a header field from being passed to the proxied server =====

Set it to an empty string as follows:

<code>
location /some/path/ {
    proxy_set_header Accept-Encoding "";
    proxy_pass http://localhost:8000;
}
</code>

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