Wordpress on Sub Directory with Nginx using Proxy Pass with No Input File error

You should be able to specify just index index.php;.

You should also change

location / { try_files $uri $uri/ /blog/index.php?$query_string; }

to

location / { try_files $uri $uri/ /blog/index.php?$args; }

and change:

fastcgi_split_path_info ^(.+\.php)(/.+)$;fastcgi_pass unix:/var/run/php/php5.6-fpm.sock;

to:

fastcgi_split_path_info ^(/blog)(/.*)$;fastcgi_pass php;

This is coming from the WordPress documentation as well as the NGINX documentation.

maybe rewrite the /blog path to supress the prefix?

server{  ...  location /blog {        #strip the '/blog' prefix        rewrite /blog/(.*) /$1  break;        proxy_set_header X-Real-IP  $remote_addr;        proxy_set_header X-Forwarded-For $remote_addr;        proxy_set_header Host $host;        proxy_pass https://blog;    }}

The reason was the upstream was not allowing for any other params ie extension .php, this was the upstream location change..

location ^~ /blog {    proxy_set_header X-Real-IP  $remote_addr;    proxy_set_header X-Forwarded-For $remote_addr;    proxy_set_header Host $host;    proxy_pass https://blog;}

Hopes this helps anyone else in the future.