Ever found yourself wondering why your nginx setup is returning a port from the backend vhost?

QUICK FIX: port_in_redirect off;

I found some tweaks to prevent this from happening, first a example:

# This is the result of a: try $uri $uri/ in a backend vhost
[email protected] ~ $ curl --head http://www.example.nl/test
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Fri, 05 Aug 2016 08:49:45 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Location: http://www.example.nl:8080/test/
Accept-Ranges: bytes
X-Varnish: 1044342160
Age: 0
Via: 1.1 varnish
Vary: User-Agent
X-Cache: MISS

The nginx config I used before ifound out what was wrong is:

server {
        listen                          80;
        server_name                     *.example.nl example.nl;

        root                            /var/www/vhosts/example.nl/httpdocs;
        include                         includes/default_vhost.conf; # proxy timeouts etc. nothing interesting

        location / {
                include                         includes/proxy_varnish.conf;    # location with varnish related conf
    }                                   # varnish sends requests on to 8080 if not in cache
}
server {
        listen                          8080;
        server_name                     *.example.nl example.nl;

        root                            /var/www/vhosts/example.nl/httpdocs;
        index                           index.php index.html index.htm;

        location / {
                index                           index.php;
                try_files                       $uri $uri/ @handler;
        }

        location ~ .php/ {
                rewrite                         ^(.*.php)/ $1 last;
        }

        location @handler {
                rewrite                         / /index.php;
        }

        location ~ \.php/ {
                rewrite ^(.*\.php)/ $1 last;
        }

        include includes/hhvm.conf; # Sends fascgi to hhvm
}

It frustrated me that the solution is not that well documented but here it is: port_in_redirect off;

Yes, noting exiting here, just place port_in_redirect off; in the backend vhost. There is also a way to not send the full hostname: server_name_in_redirect off;

This will result in a config like this:

server {
        listen                          80;
        server_name                     *.example.nl example.nl;

        root                            /var/www/vhosts/example.nl/httpdocs;
        include                         includes/default_vhost.conf; # proxy timeouts etc. nothing interesting

        location / {
                include                         includes/proxy_varnish.conf;    # location with varnish related conf
    }                                   # varnish sends requests on to 8080 if not in cache
}
server {
        listen                          8080;
        server_name                     *.example.nl example.nl;

        root                            /var/www/vhosts/example.nl/httpdocs;
        index                           index.php index.html index.htm;
    port_in_redirect        off; 

        location / {
                index                           index.php;
                try_files                       $uri $uri/ @handler;
        }

        location ~ .php/ {
                rewrite                         ^(.*.php)/ $1 last;
        }

        location @handler {
                rewrite                         / /index.php;
        }

        location ~ \.php/ {
                rewrite ^(.*\.php)/ $1 last;
        }

        include includes/hhvm.conf; # Sends fascgi to hhvm
}

- Stein van Broekhoven


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