Re: WCCP - cache only , no proxy

Michael Vincent K. Pozon - CompE wrote:

> it's cache but upon retrieving the object , squid uses the client's IP
> address who requested the object ...

The hardest part is to get the return packets to go to Squid rather than
the client IP. WCCP can redirect the client requests to Squid, but how
do you redirect the packets arriving from the internet to Squid if Squid
is using the client's IP address?

I only see this possible when Squid is running on the border gateway or
behind a smart L4 switch who tracks TCP sessions rather than IP/mac
addresses, not when using WCCP.

Then you also have to modify Squid and the OS TCP/IP implementation
somewhat, and cross your fingers that you don't kill anything else of
TCP/IP in the process (all these kinds of redirection, including WCCP is
in direct violation against basic IP networking standards)

--
Henrik Nordstrom
Squid hacker