Varnish vs. X-JSON header

[Florian Engelhardt]

On Fri, 28 Mar 2008 10:41:43 +0100
Stig Sandbeck Mathisen <ssm at linpro.no> wrote:

> On Fri, 28 Mar 2008 08:15:59 +0100, Florian Engelhardt
> <f.engelhardt at 21torr.com> said:
> 
> Received from backend.
> 
> >    15 RxHeader     b X-JSON: foobar
> 
> Varnish object contains the header.
> 
> >    14 ObjHeader    c X-JSON: foobar
> 
> Sent to client.
> 
> >    14 TxHeader     c X-JSON: foobar
> 
> Lost on the way :P
> 
> > Hehe, problem solved. It looks like our admin configured our
> > firewall a little bit to restrictive.  The header is in the
> > response, but it gets filtered out firewall.
> 
> Good thing you have logs to see what happened.  What kind of firewall
> is it, and what is it trying to do with your HTTP requests?  Remove
> all headers it does not recognize?

Its a Watchguard Firewall, configured to remove all headers not
recognized.

> > One thing left: The "Transfer-Encoding" is still missing in the
> > response.
> 
> "Transfer-Encoding: chunked" is set by the backend, but when the
> object is sent from Varnish to the client, it's not present.  I'm not
> sure if it is still relevant for the varnish->client connection.  
> 
> Does the absense of the header create problems?

No, no problems so far.

Thanks for helping me.

Kind regards

Flo