RE: [squid-users] squid and http keepalive

Hi Henrik,
Thanks a lot for your response.

> It already writes the source IP in the X-Forwarded-For header.
Does it also have the port number in the X-Forwarded-For Header? I also need
the port number.

> Assuming the connectivity is good Squid -> your_proxy -> origin you
> could just as well disable server side persistent connections I think.
Squid and our reverse proxy reside on the same machine and communicate on
the loop back interface. So there should be no problems with that.

> server_side_persistent off
Can you give me more details about this config option. I don't find any
reference in the web about this option.

-----Original Message-----
From: Henrik Nordstrom [mailto:henrik@henriknordstrom.net]
Sent: Friday, January 05, 2007 10:15 AM
To: suresh@picorp.com
Cc: squid-users@squid-cache.org
Subject: Re: [squid-users] squid and http keepalive

tor 2007-01-04 klockan 21:32 +0530 skrev L.Suresh:

> - is it possible for squid to write the source ip/port of a http
> request into the request header when it forwards to reverse proxy? I
> need this information to make some network optimizations in reverse
> proxy

It already writes the source IP in the X-Forwarded-For header.

> - squid reuses the connection with reverse proxy for a different
> browser request. to be more clear, lets say browser B1 issued a http
> request with keep-alive, squid forwards to reverse proxy (lets call
> the link between squid and reverse proxy as link 1) and then it goes
> downstream. Now if another browser B2 issues a request for the same
> domain, squid reuses the link1 for this request. The problem is we
> don't parse http request boundaries in our reverseproxy module for
> perf reasons and I would like link1 to be maintained only for browser
> B1 and squid to open a new link to reverse proxy for B2. is this
> possible?

Only if you modify the code. The reasons why Squid does this is twofold:

a) Recommended by the RFC

b) Cuts down on the resource usage on the server as there is
significantly less number of connections open, often several orders of
magnitude difference.

Assuming the connectivity is good Squid -> your_proxy -> origin you
could just as well disable server side persistent connections I think.

   server_side_persistent off

Regards
Henrik
Received on Thu Jan 04 2007 - 23:26:34 MST