user@computer:/etc/squid3$ sudo aptitude show squid3
Package: squid3
State: installed
Automatically installed: no
Version: 3.1.19-1ubuntu3.12.04.1

I want no caching just proxy filtering from dansgaurding and squidguard. I did I web search and got much info need help sorting it out.

#no local caching
maximum_object_size 0 KB
minimum_object_size 0 KB

# specify uncachable requests
acl all src
no_cache deny all

# avoid having a cache directory
cache_dir null /tmp
cache_dir null /null

and also found
cache deny all
I do not know which of these to use and I also do not know where to put them in my squid.conf file