nginx conf

location / {
   proxy_pass http://squid;
   proxy_redirect     default;
   proxy_set_header   Host             $host;
   proxy_set_header   X-Real-IP        $remote_addr;
   proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
   client_max_body_size       10m;
   client_body_buffer_size    128k;
   proxy_connect_timeout      90;
   proxy_send_timeout         90;
   proxy_read_timeout         90;
   proxy_buffer_size          4k;
   proxy_buffers              4 32k;
   proxy_busy_buffers_size    64k;
   proxy_temp_file_write_size 64k;
}

location ~ nocache$ {
    proxy_pass http://apache;
    break;
}