I have my site which is using nginx, and testing site with header testing tools e.g. http://www.webconfs.com/http-header-check.php but every time it says 400 bad request below is the out put from the tool. Though all my pages load perfectly fine in browser and when I see in chrome console it says status code 200OK.
HTTP/1.1 400 Bad Request =>
Server => nginx
Date => Fri, 07 Sep 2012 09:40:09 GMT
Content-Type => text/html
Content-Length => 166
Connection => close
I really don't understand what is the problem with my server config?
A bit of googling suggests to increase the buffer size using, and I increased it to following:
large_client_header_buffers 4 16k;
The same results persist.
Can some one guide me to the right direction?
As stated by Maxim Dounin in the comments above:
When nginx returns 400 (Bad Request) it will log the reason into error log, at "info" level. Hence an obvious way to find out what's going on is to configure error_log to log messages at "info" level and take a look into error log when testing.