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Re: [K12OSN] transparent proxying with LTSP--SOLVED



These lines even take care of access directly from the LTSP server, it's a slightly simpler setup with a separate machine, but this works.

On Feb 24, 2006, at 1:21 AM, Sudev Barar wrote:

On 2/24/06, Brad Johnson <bjohnson independence k12 ia us> wrote:
Ok, so here's what I've got......
LTSP network connects to LSTP server--connects to remainder of
LAN-- connects to Internet.  Where do I put the IPCop Box....do I
put it  directly between LTSP and the remainder of the LAN?

Ours sits between our LAN and the internet.  If the clients on your
LAN are transparently proxied, then your LTSP clients will also.
This applies to your current configuration as well.

Thanks for the help today guys.  I must admit, I am iptables-
challenged.  Since I currently already had a squid/danguardian box
on the network, my prefernce was to continue using it.  I then
found an old post on the list from 2003, courtesy of Eric Harrison,
that led me directly to this wiki link:
http://k12ltsp.org/phpwiki/index.php/WebFiltering%3AIntegration

which provided me with the two following rules:

iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination
192.168.1.1:3128
iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-
destination 192.168.1.1:3128


IPTables challanged as well. What would work if k12box is  iteself
connecting to big bad internet? I want that all internet traffic from
clients on this box (effectively traffic from the box itself) is
routed always through squid/proxy running on the same box itself.
With above syntax all tcp packets will be diverted to proxy:port
given, which would inclde packets from squid/proxy itself. Is this
correct hypothesis or I am wrong in assuming that packets after coming
out of squid/proxy would not be to port 80???

--
Sudev Barar
Learning Linux

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