nginx + cookies + firefox = 400 Bad Request

[Igor Sysoev]

On Mon, Dec 15, 2008 at 05:59:07PM -0800, Neil Sheth wrote:

> I'm continuing to also see issues with nginx returning 400s, I posted
> another thread about this earlier.  The suggestions here are worth
> trying, hopefully they help!
> 
> For the large_client_header_buffers setting, what values are recommended?

To see 400' reasons you should set error_log level to info:

error_log  /path/to/log  info;

They may be not associated with bufers at all.

As to large_client_header_buffers, Apache's default one header limit is 8K:
http://httpd.apache.org/docs/2.0/mod/core.html#limitrequestfieldsize

nginx's defaults are

client_header_buffer_size    1k;
large_client_header_buffers  4 4k;
                        # or 4 8k for sparc64/ppc64 (but not amd64)

You will see in log that these buffers are no enough, you may set

client_header_buffer_size    1k;
large_client_header_buffers  8 8k;

> Also, for proxy_buffers, I have the following:
>             proxy_buffer_size          4k;
>             proxy_buffers              4 32k;
>             proxy_busy_buffers_size    64k;
>             proxy_temp_file_write_size 64k;
> 
> Any suggestions if those should be tweaked in any manner?
> 
> Thanks!
> 
> 
> 
> On Mon, Dec 15, 2008 at 2:46 AM, Oliver Pestring <lists at ruby-forum.com> wrote:
> > Maxim Dounin wrote:
> >> You should tune large_client_header_buffers in your nginx config, see
> >> http://wiki.codemongers.com/NginxHttpCoreModule#large_client_header_buffers
> >> for details.
> >>
> >> The problem AFAIK is vbulletin which sets enormous number of
> >> various cookies.
> >
> >
> > Many thanks guys! It seems that the issue doesnt occur with the
> > 0.7.26-version. I compiled it manually yesterday evening and vbulletin
> > and Mantis work perfectly with the previous config until now.
> > Just to be sure Ive now followed your advices and added some larger
> > values for large_client_header_buffers and proxy_buffer_size too. Also
> > switched from cookie-based activity to db-based for vb.
> >
> > My testsystem is still on lennys 0.6.32 and here an increased
> > large_client_header_buffers was even enough to get it working again.
> > Perfect ;)
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> > Posted via http://www.ruby-forum.com/.
> >
> >

-- 
Igor Sysoev
http://sysoev.ru/en/