Re: AW: Squid as reverse proxy

Yes.

One correction/clarification: The x.x.x.x and y.y.y.y addresses in the
redirector is the Internet addresses assigned to the Squid proxy, not to
be confused with the backend addresses used in /etc/hosts...

Now you may ask why I redirect to domain names and not the backend
server IP addresses?

a) To make sure the server will receive it's real name. This is used in
redirects, CGI programs and other functions generating full URL's on the
server. As a consequence you should also make sure the HTTP server knows
it's real name if there is such a configuration setting (i.e. ServerName
in Apache config).

b) It allows the same setup to transition to also support virtual
domains (Host header based). Simply enable httpd_accel_uses_host_header,
and list all the domains hosted by each backend IP as aliases to that IP
in /etc/hosts.

--
Henrik Nordstrom
Squid hacker
Christoph Stotz wrote:
> 
> Hello !
> 
> As far as I understand, solution b) matches exactly my request
> I sent to the list on 02.08.00 titled "Accelerating Multiple
> Servers located on different Machine" (see below)
> 
> Is this correct ?
> 
> <---cut here---><---cut here---><---cut here---><---cut here--->
> Hello !
> 
> I had a closer look to the FAQ and message archives before decinding to post
> my question, but I didn´t find any answer to my problem:
> 
> I have a Linux Box with Squid 2 (Stable 5) up and running. The machine has
> two
> NIC´s, one on the inner network (some people call that Intranet) and the
> other
> interface on the external network (which is the internet). The machine has
> many
> IP-Addresses on the outside interface and one single on the inside
> interface.
> 
> What I would like to configure is that I place many Web-Servers on my inner
> network (on one or more machines which is not the Squid-Box itself) and to
> be able to do http://<first_outside_ip> and to get the accelerated version
> of my first webserver on the inner network. Then to do
> http://<second_outside_ip>
> and to get the next web server.
> 
> I can immagine that this may be done by running more than one Squid-Instance
> -
> however I would like to do it with only one instance.
> 
> Is that possible ?
> 
> Many thanx for your help - and please don´t blame me if this is a old
> question.
> I really tried to find an answer to this.
> 
> Kind Regards
> 
> Christoph Stotz
> <---cut here---><---cut here---><---cut here---><---cut here--->
> 
> > -----Ursprüngliche Nachricht-----
> > Von: Henrik Nordstrom [mailto:hno@hem.passagen.se]
> > Gesendet am: Donnerstag, 3. August 2000 18:33
> > An: satinder chadha
> > Cc: squid-users@ircache.net
> > Betreff: Re: Squid as reverse proxy
> >
> > How do you want Squid to differentiate between the different servers?
> >
> > a) By the Host header
> >
> > b) By unique Internet IP addresses
> >
> > c) Different potions of the URL "file" space
> >
> >
> > ---- Alternative A ----
> >
> > Suqid.conf:
> >
> > httpd_accel_host your.primary.domain
> > httpd_accel_uses_host_header on
> > acl accelerated_servers dst y.y.y.y z.z.z.z
> > http_access allow accelerated_servers
> >
> > /etc/hosts:
> >
> > y.y.y.y               domain.of.server.1
> > z.z.z.z               domain.of.server.2
> >
> > Squid build options:
> >
> > ./configure --disable-internal-dns ....
> >
> >
> > --- Alternative B ----
> >
> > Squid.conf:
> >
> > httpd_accel_host virtual
> >
> > /etc/hosts:
> >
> > as above
> >
> > Squid build options:
> >
> > as above
> >
> > Squid machine setup:
> >
> > 1 virtual IP address for each server, and this IP is officially
> > registered on the domain name.
> >
> > Redirector program:
> >
> > #!/usr/bin/perl -p
> > s%http://y.y.y.y\b%http://domain.of.server1% && next;
> > s%http://z.z.z.z\b%http://domain.of.server2% && next;
> >
> >
> > --- alternative C ---
> >
> > Use a more advanced redirector. No example given here.
> >
> > /Henrik
> >
> >
> >
> > satinder chadha wrote:
> > >
> > > Hi Henrik ,
> > >
> > > I am facing a problem in configuring squid as reverse proxy
> > . I want one
> > > single squid to act as a revrese proxy for multiple web
> > servers on different
> > > machines . Can you tell me how can I setup my squid to act as both
> > > accelerator and redirector along with the redirecting
> > script required on
> > > perl .
> > >
> > > teh scenario is
> > > My squid has IP x.x.x.x and the webservers have  ip of
> > y.y.y.y , z.z.z.z  .
> > > Can you suggest me the squid.config file and the redirector script .
> > >
> > > Regards
> > > Satinder
> > >
> > ______________________________________________________________
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