nginx serves 403 error when accessing directories - php

Question

My server has roughly this arborescence:
www
|-index.php
|foo
|-index.php
|-bar.php
I can access to /index.php, but accessing to /, /foo or anything else result in a 403. I've tried various config, but none of them is working.
My nginx.conf file:
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
gzip on;
gzip_disable "msie6";
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
server {
listen 80;
server_name localhost;
root /var/www/html;
location / {
root /var/www/html;
#try_files $uri /index.php$is_args$args;
}
location ~ \.php$ {
fastcgi_pass web_fpm:9000;
fastcgi_index index.php
fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name;
include fastcgi_params;
}
}
}
If I uncomment the commented line, any request serves /index.php, so it's no good.

Answer 1

I've found the solution: setting the index. Here is the snippet:
server {
listen 80;
server_name localhost;
root /var/www/html;
autoindex on;
location / {
index index.php index.html;
}
location ~ \.php$ {
fastcgi_pass web_fpm:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name;
include fastcgi_params;
}
}