how to make squid work like proxy only, without caching anything [duplicate]

Possible Duplicate:
How to prevent squid from caching and just filter?

I want to make squid work purely as a proxy, so that it does not cache anything.

Is such a usage of squid possible? How do I do this?

I am using v3.1 of Squid on Cent OS 6.2- x86 edition.

This is straight out of the Squid FAQ:

Can I make Squid proxy only, without caching anything?

Sure, there are few things you can do.

You can use the cache access list to make Squid never cache any response:

cache deny all

With Squid-2.7, Squid-3.1 and later you can also remove all 'cache_dir' options from your squid.conf to avoid having a cache directory.

With Squid-2.4, 2.5, 2.6, and 3.0 you need to use the "null" storage module:

cache_dir null /tmp

Note: a null cache_dir does not disable caching, but it does save you from creating a cache structure if you have disabled caching with cache. The directory (e.g., /tmp) must exist so that squid can chdir to it, unless you also use the coredump_dir option.

To configure Squid for the "null" storage module, specify it on the configure command line:

--enable-storeio=null,...