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From Jim Jagielski <>
Subject Re: Apache proxy engineering specs
Date Mon, 10 Sep 2007 18:27:22 GMT
In that case, I think we can answer your question...
As you know, HTTP operates above tcp/ip which means
that there is the normal tcp/ip handshaking
and "flow" between the client and Apache, whether
Apache is itself handling the request or if
it is a proxy for another server. Apache simply
takes the request that comes in from the client
and then "passes that through" to the backend,
pretending to be a client, if you catch my drift.
If you were to sniff the traffic between the
client and Apache, you would not be able to tell,
at the tcp/ip layer, whether Apache would be operating
as a proxy or not.

On Sep 10, 2007, at 2:19 PM, Shaw, Dan wrote:

> Yes, that is correct TCP/IP transport layer.
> Thanks,
> Dan
> Daniel P. Shaw
> Triad Financial
> Pro-Tem Contractor
> Ext: 25106
> Ph: 714-799-5106
> Start Date: 08-13-2007
> -----Original Message-----
> From: Jim Jagielski []
> Sent: Monday, September 10, 2007 10:46 AM
> To:
> Cc: Minato, Rick;
> Subject: Re: Apache proxy engineering specs
> On Sep 10, 2007, at 1:29 PM, Shaw, Dan wrote:
>> Sure,
>> We are going to be implementing BizTalk and BizTalk guaranties
>> delivery
>> of messages per their application.  One of the first layers is the
>> transport layer BizTalk listens to for ACK(s) and if the ACK(s) come
>> from the proxy server then we will get a false positive and the
>> connection closes.
>> I did get a reply from another apache DEV and they indicate that I
>> maybe
>> looking for persistent and stateful. OK that is fine but the very
>> first
>> thing I need to know is if a proxy server responds with ACK(s) from
>> requesting clients.
>> We believe the proxy server does not respond with ACK from a client
>> and
>> it passes the data onto the server in which the server responds
>> with ACK
>> and then connection is closed.  But again this is a guess just
>> based on
>> out research hence out question out to the dev apache arena.
>> Let me know if you need additional information I will send it.
> By ACK, I'm guessing you mean at the tcp/ip layer??

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