RE: Transparent Proxy

> Jordan Mendelson wrote:
> >
> > > On Thu, May 14, 1998 at 03:16:57PM +0000, Markus Sabadello wrote:
> > > : I am interested in the experimental 'transparent proxy' feature of
> > > : newer Linux kernels, and I wondered if this could be used to make
> > > : browsers go through proxys without knowing it. I configured my
> > > : intranet gateway to redirect every port 80 connections to local port
> > > : 8080 (squid port) and I told my browser NOT to use a proxy.
> It worked
> > > : well; when I tried to connect to home.netscape.com:80, the
> connection
> > > : was redirected to my local intranet gateway at port 8080, but the
> > > : problem was that my browser sent the following lines:
> > > :
> > > : GET / HTTP/1.0
> > >
> > > Yes, it's not enough to redirect the request. You must rewrite the
> > > request to the complete url. There exists a little daemon
> `trproxyd' or
> > > `transproxy' doing that.
> > >
> > > 0/0 80 redirect -> 81 -> tproxyd -> 8080
> >
> > Linux does not require such a daemon (and for the life of me I
> can't figure
> > out why people keep bringing it up). All that is required to setup
> > transparent proxies under Linux is to compile it into the
> kernel and use:
>
> No, linux doesn't require it. But HTTP does, because a proxy-aware
> request and a non-proxy-aware request follow two different syntaxes.
> Transparent proxying is something altogether different (although not
> incompatible with, and often quite useful with) HTTP proxying.
>
> tproxyd is an http request reformatter designed to make use of linux's
> transparent proxying featureset.

I'm confused a bit. Squid itself understands transparent proxy connections.
I don't use tproxyd, but I have full transparent proxying (with hostnames
using the Host: header in most modern web browsers).

I just set:

httpd_accel virtual 80
httpd_accel_with_proxy on

and it chugs along without any silly daemon eating resources :)

Jordan

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