Re: Automatic Proxy Configuration
Re: Automatic Proxy Configuration
- Subject: Re: Automatic Proxy Configuration
- From: Larry Gerndt <email@hidden>
- Date: Sat, 28 Feb 2004 12:20:00 -0800
>
> Hi, Anybody got any pointers to speed up the when you machines connected via
>
> this route, as its painfully slow :-(, as I guess a lot of corporate's use
>
> this style web access.
>
There's not much you can do about it, as on the client's side nothing is
>
different from the situation when it's connected directly.
>
>
The only way to improve performance is to fine-tune the proxy server itself,
>
or maybe upgrade it. New, optimized server-side software can also help.
Actually there is one thing you can try, which is referred to as "TCP
tunneling in Web proxy servers". It's described in this RFC:
http://www.web-cache.com/Writings/Internet-Drafts/draft-luotonen-web-proxy-t
unneling-01.txt
It's an extension to the HTTP protocol which consists of a new method called
"CONNECT" (i.e. "CONNECT <host:port>"), which you send to the proxy after
you establish the TCP connection. If the proxy responds saying ok, it now
begins acting like a transparent tunnel, so you can now send and receive
directly to the destination server, as if you had a direct connection to it.
I'm still experimenting with this, but my initial tests indicate that this
does indeed speed things up, but be warned: According to one firewall
expert, most proxies out there only allow CONNECT for SSL (port 443), so
unless you're using SLL, chances are the Proxy won't allow the CONNECT
method. However, it doesn't hurt to try. It will tell you whether it
created the tunnel for you or not by its response to the CONNECT method.
--
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