I have squid running just fine on a "Ubuntu 8.04.2" system.

Like this:
clients (192.168.6.x) <--> Squid on Ubuntu (192.168.6.101) <--> Internet

There are a whole bunch of clients that use this Ubuntu system as their proxy.

For a few days temporarily, I need to use another squid.
But it is not practical to go to each desktop to make the same temporary change.

How can I do this:
clients (192.168.6.x) <--> Squid on Ubuntu (192.168.6.101) <--> other temporary Squid (192.168.3.200) <--> Internet

What do I specify in "squid.conf" on the Ubuntu such that it routes this web traffic to the squid at 192.168.3.200 ?

So then later on I can go back to the "squid.conf" and un-do these changes.

Hello


Please provide me some more details like are you using your squid server as a router too. If yes then follow these steps:

First you need to setup your temporary squid server to run on different port what you are running on your permanent squid now.

Add an entry in your temporary squid something like this: http_port 8080 transparent

Change the port number if your permanent squid is using this port.

The second step you need is to configure your firewall to to redirect all the IP traffic on your network to be redirected to your squid port.

The command is: iptables -t nat -A PREROUTING -p tcp --dport 80 -i eth0 -s 192.168.1.0/24 -j REDIRECT --to-port=3128

Here you can change the NIC interface ID to whatever your system is using & secondly the Subnet. For e.g. if you need 192.168.3.0/24 subnet to be redirected through your transparent proxy then replace 192.168.1.0/24 with 192.168.3.0/24.


Let me know if you have any more issues after following these steps.



Good Luck

Some more details about my network.

I cannot make any changes to the firewall. I do not control it.

The permanent Squid on Ubuntu (192.168.6.101) is NOT running on the same port as
the temporary Squid (192.168.3.200).

I can make changes to squid.conf on these 2 systems.

Can you tell me how to changes to the settings in the squid.conf on 192.168.6.101 so that it just sends/forwards everything to 192.168.3.200 port abcde ?

As far as I know about squid there is nothing like a slave squid server.

And you said you also can not make any changes to the firewall of your network, so only one option left is to swap the IP address of your permanent & temporary server if you don't want the botheration of changing the IP Addresses on every client machine. :-)

This looks like the answer I was looking for:

"How do I configure Squid forward all requests to another proxy?"
located at:
http://wiki.squid-cache.org/SquidFaq/ConfiguringSquid

Looks a very good Documentation but did u implemented it successfully in ur scenario?