[ILUG] either transparent proxy or iptables problem.

[Darragh]

I'm finally getting somewhere!

Looks like there was no entry for routing traffic from p80 to p3128 in
iptables.

One question though,  using iptables -L or iptables -L -v, how can you see
that?

It doesn't seem like a very efficient way of administering things at all. 
from my position anyway..

ok, I added the rule into iptables as follows:
iptables -t nat -A PREROUTING -i $LAN_IN -p tcp --dport 80 -j DNAT --to
$SQUID_SERVER:$SQUID_PORT

iptables -t nat -A PREROUTING -i $INTERNET -p tcp --dport 80 -j REDIRECT
--to-port $SQUID_PORT

ok.  when I do that, it looks like squid is seeing the connections however
it's giving me a very strange error.

Sorry for all the questions, but I think I'm nearly there.  there is just 
a few more things to get out of the way.

To be more specific,  I can connect to the internet if I configure the
client to use the proxy 192.168.2.5:3128 but using iptables, it says
something about the http request is malformed.

any suggestions as to how I can determine exactly what it's finding fault
with?  could it be because of something that's getting changed in the
header as it's passing through the routing?

The page I am shown when connecting to google.com while the transparent
proxy seems to be reached is:


ERROR
The requested URL could not be retrieved

--------------------------------------------------------------------------------

While trying to process the request:

GET / HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/x-ms-application, application/vnd.ms-xpsdocument,
application/xaml+xml, application/x-ms-xbap,
application/x-shockwave-flash, application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, */*
Accept-Language: en-ie
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET
CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.04506; InfoPath.2; .NET
CLR 1.1.4322)
Host: www.google.com
Connection: Keep-Alive
Cookie:
PREF=ID=479ee288bf4f1dee:TM=1195983768:LM=1196018798:GM=1:S=GIti4nhRYTdc0T7B


The following error was encountered:

Invalid Request
Some aspect of the HTTP Request is invalid. Possible problems:

Missing or unknown request method
Missing URL
Missing HTTP Identifier (HTTP/1.0)
Request is too large
Content-Length missing for POST or PUT requests
Illegal character in hostname; underscores are not allowed
Your cache administrator is webmaster.



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Generated Sat, 05 Jan 2008 00:09:51 GMT by server.digitaldarragh
(squid/2.6.STABLE14)

Darragh