There is no such HTTP 505 "OK".
It means "HTTP Version Not Supported".

What were you testing?
How did you test it?
What result did you expect?
What result did you get?
---
*B. R.*

On Tue, Aug 4, 2015 at 11:57 PM, nginxuser100 <nginx-forum@nginx.us> wrote:

> Hi, does NGINX support the generation of the error message for HTTP error
> code 505? For example, I see
>
> "401 Authorization Required" when running nginx 1.6.2
> but I don't see anything for 505. NGINX would return "505 OK" in the HTTP
> response.
>
> Thank you.
>
> Posted at Nginx Forum:
> http://forum.nginx.org/read.php?2,260754,260754#msg-260754
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx
>
_______________________________________________
nginx mailing list
nginx@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx