hi
There is no special package for Transparent-proxy.., The configuration file is same whether u wana use it as simple proxy or Transparent proxy...
by default the file name is squid.conf and location is :
/etc/squid/squid.conf
Other thing is that if u r giving ipaddress of ur Proxy Server on Clients Browsers ...then ur squid is simple squid ..
Transparent squid or proxy is that ..where u dont need to give Proxy Server Settings on Clients Browsers.
Means all web requets are automatically transffered to Proxy Server .., u need not to proxy server address on Client Side Browser settings,so its Transparent from users that whether they are using Proxy or Not
To make squid as Transparent proxy You need to REDIRECT the 80 port or web Requests to 3128 Port...
I.e U need to apply iptables rules to make squid as Transparent proxy ..Rest all things are somewhat similar
There is tutorials available for squid which is written by RICKY, U can take help through that tutorial..If still u will find any difficulty then post here.
Just go through this link
http://www.linuxsolved.com/forums/ftopic116.htmlGaurav