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Transparent caching problem

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Hi,

This is kind of driving me crazy. I've been trying to
get transparent caching to work for the last 2 days
without success.

I am only posting to get help after I read so much on
this and I think I quite understand what needs to be
done but still DG/SQUID do not see the traffic.

Ok, so I have a RHEL ES 4 box running DansGuardian and
Squid. DG listening on 8080 and squid on 3128. I have
a Cisco 3640 with wccp enabled. Router can see the
cache and traffic redirection on the router is working
fine and it gets all the way to the DG/squid box and
is actually being decapsulated (can see that through
ethereal). I am using the ip_wccp mod.
I also have the required iptables rule in place to
redirect traffic to DG port 8080.
Here's the output of iptables -t nat -L:
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination
REDIRECT   tcp  --  anywhere             anywhere     
      tcp dpt:http redir ports 8080

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

If I manuallay setup my browser to point directly to
DG:8080, everything works nicely which tells me DG and
squid are able to work together ok in both direction.
I think the problem is somehow traffic is not getting
redirected to port 8080 after being decapsulated.
Any ideas why?

I have ip forwarding enabled. Also, here are the
relevent settings of DG:
filterip = 127.0.0.1
filterport = 8080
proxyip = 127.0.0.1
proxyport = 3128

and squid:
http_port 3128
acl localhost src 127.0.0.1/255.255.255.255
http_access allow localhost
httpd_accel_host virtual
httpd_accel_port 80
httpd_accel_single_host off
httpd_accel_with_proxy on
httpd_accel_uses_host_header on
wccp_router 80.246.48.1
wccp_version 4

from the router:
LOLROUTER#show ip wccp web-cache
Global WCCP information:
    Router information:
        Router Identifier:                  
80.246.49.5
        Protocol Version:                    1.0

    Service Identifier: web-cache
        Number of Cache Engines:             1
        Number of routers:                   1
        Total Packets Redirected:            1478790
        Redirect access-list:                www
        Total Packets Denied Redirect:       0
        Total Packets Unassigned:            0
        Group access-list:                   -none-
        Total Messages Denied to Group:      0
        Total Authentication failures:       0

LOLROUTER#show ip wccp web-cache detail
WCCP Cache-Engine information:
        Web Cache ID:          0.0.0.0
        Protocol Version:      0.4
        State:                 Usable
        Initial Hash Info:    
00000000000000000000000000000000
                              
00000000000000000000000000000000
        Assigned Hash Info:   
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
                              
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
        Hash Allotment:        256 (100.00%)
        Packets Redirected:    219
        Connect Time:          01:56:26


Any help is much appreciated.

Thanks,
Kamel

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