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--- web_servers:nginx:setup_nginx_reverse_proxy [2021/10/13 16:31] – created peter
+++ web_servers:nginx:setup_nginx_reverse_proxy [2021/10/13 16:43] (current) – peter
@@ Line 25: / Line 25: @@
 </code>
+----
+===== Disable the default virtual host =====
+<code bash>
+unlink /etc/nginx/sites-enabled/default
+</code>
+----
+===== Create a reverse proxy configuration file =====
+All of the settings for the reverse proxy will go inside of a configuration file, and this file needs be placed inside the **sites-available** directory.
+<code bash>
+cd /etc/nginx/sites-available
+</code>
+Create the configuration file:  /etc/nginx/sites-available/reverse-proxy.conf
+<file bash /etc/nginx/sites-available/reverse-proxy.conf>
+server {
+    listen 80;
+    location /some/path/ {
+        proxy_pass http://example.com;
+    }
+}
+</file>
+<WRAP info>
+**NOTE:**  This will work for HTTP servers, but Nginx also supports other protocols.
+  * Replace example.com with the IP address or hostname of the server you are forwarding to.
+    * A port can also be specified with the hostname, such as 127.0.0.1:8080.
+</WRAP>
+----
+===== Enable the proxy =====
+Enable the new configuring by creating a symbolic link to the **sites-enabled** directory:
+<code bash>
+ln -s /etc/nginx/sites-available/reverse-proxy.conf /etc/nginx/sites-enabled/reverse-proxy.conf
+</code>
+----
+===== Proxy Non-HTTP servers =====
+Nginx can also act as a reverse proxy for FastCGI, uwsgi, SCGI, and memcached.
+Rather than using the **proxy_pass** directive shown above, replace it with the appropriate type:
+  * **proxy_pass**: (HTTP server – as seen above)
+  * **fastcgi_pass**:  FastCGI server.
+  * **uwsgi_pass**:   uwsgi server.
+  * **scgi_pass**:   SCGI server.
+  * **memcached_pass**:  Mmemcached server.
+----
+===== Pass Headers =====
+To configure what headers the reverse proxy server passes to the other server(s), define them in the same /etc/nginx/sites-available/reverse-proxy.conf configuration file.
+Use the **proxy_set_header** directive to adjust the headers.
+  * They can be configured in the server, location, or http block.
+<file bash /etc/nginx/sites-available/reverse-proxy.conf>
+location /some/path/ {
+        proxy_set_header HOST $host;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_pass http://example.com;
+}
+</file>
+<WRAP info>
+**NOTE:**  This defines three types of headers and sets them to the respective variables.
+  * There are a lot of different options for passing headers.
+  * **Host**:  contains information about which host is being requested.
+  * **X-Forwarded-Proto**:  species if the request is HTTP or HTTPS.
+  * **X-Real-IP**:  contains the IP address of the requesting client.
+</WRAP>