Is it possible to use a web proxy only as a caching source

Is it possible to use a web caching proxy only a s a caching source for internet access.

I need this solution to really lockdown clients to special informations in the internet. So the idea is to see the informations and store them on a caching server where the clients access.

I thought to use squid but i am open minded. Does someone know if this is possible.
Web filter is not a solution for this scenario.
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Wilder_AdminAsked:
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btanConnect With a Mentor Exec ConsultantCommented:
sure that squid should be able to fulfill and it is basically the same as the usual proxying on the gateway. Due to the importance of being the "middleman btw the internal and external, we should use squid's internal configuration and only bind it to the internal interface(s), not letting the outside world attempt to use it as a proxy to get at your internal LAN. It supports ACL's (Access Control Lists) built into the squid.conf file, allowing you to lock down access by names, IP’s, networks, time of day, actual day. One quick example to prevent anyone from using Squid to probe your internal network.

E.g. requests from 10.0.0.0/24 forwarded with src address 10.1.0.1,
E.g.  specific 10.0.2.0/24 forwarded with src address 10.1.0.2
E.g. any others will be forwarded with src address 10.1.0.3.

acl ipA src 10.0.0.0/24
acl ipB 10.0.2.0/24

tcp_outgoing_address 10.1.0.1 ipA
tcp_outgoing_address 10.1.0.2 ipB
tcp_outgoing_address 10.1.0.3

we can further this to use IPTables to accept all HTTP requests coming from our Squid user, and redirect all others as transparent or restrict to certain ip ranges - more info in tis wiki https://wiki.archlinux.org/index.php/squid

another possible candidate is zeroshell that does even more - http://www.zeroshell.org/proxy-antivirus/

but as in all proxy caveat, the proxy is able to capture these web requests, only if it is configured as a network gateway, and all client Internet traffic goes through it and even to lockdown browser to specific proxy if possible as policy.
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bbaoIT ConsultantCommented:
mmm... caching source is just what a web proxy does, anything else a proxy can do? :)
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Wilder_AdminAuthor Commented:
Thanks that was exactly the information i needed
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