Nginx 1.1.15 does not block request if I use "try_files". This is my markup (simplified):

nginx.conf:
http {
limit_req_zone $binary_remote_addr zone=zone1:32m rate=2r/s;
limit_req_zone $binary_remote_addr zone=zone2:32m rate=12r/m;
server {
location @backend {
limit_req zone=zone1 burst=10;
limit_req zone=zone2 burst=100 nodelay;
[...]
fastcgi_pass unix:/var/run/fastcgi/dispatch.sock;
[...]
}
location / {
try_files $uri @backend;
expires max;
}
}
}