Re: Squid + Cisco 4500 + WCCP2

Ioannis Pliatsikas <gpliats@xxxxxxxxxx> · Wed, 25 Jul 2012 10:29:14 +0000

Only 1 interface is available

Sorry. forgot to add that i have also configured that

echo 0 > /proc/sys/net/ipv4/conf/default/rp_filter
echo 0 > /proc/sys/net/ipv4/conf/eth0/rp_filter
echo 1 > /proc/sys/net/ipv4/ip_forward

Thank you
John

On Wed, 25 Jul 2012 15:05:33 +0530, Indunil Jayasooriya wrote:
On Wed, Jul 25, 2012 at 3:04 PM, Indunil Jayasooriya
<indunil75@xxxxxxxxx> wrote:

Can your squid box to go to internet ? ( Pls check /etc/resolv.conf 
file )

How many interfaces does your squid box have?

1 or 2 ?

in /etc/sysctl.conf  file , pls check net.ipv4.ip_forward parameter? 
try
to make it to one in following manner.

net.ipv4.ip_forward = 1

On Wed, Jul 25, 2012 at 2:13 PM, Ioannis Pliatsikas 
<gpliats@xxxxxxxxxx>
wrote:

Very sorry for bothering you again

although i get the redirection from the router to squid, using 
tcpdump
(10.72.192.61 test internal address)

11:38:37.956330 IP 199.47.218.151.80 > 10.72.192.61.50690: Flags 
[S.],
seq 1048613649, ack 1347334415, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:38.399796 IP 10.72.192.61.50697 > 199.47.218.151.80: Flags 
[S], seq
3043000771, win 8192, options [mss 1460,nop,wscale 
2,nop,nop,sackOK], length
0
11:38:38.399880 IP 199.47.218.151.80 > 10.72.192.61.50697: Flags 
[S.],
seq 3389808826, ack 3043000772, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:39.756353 IP 199.47.218.151.80 > 10.72.192.61.50697: Flags 
[S.],
seq 3389808826, ack 3043000772, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:41.356350 IP 176.9.44.80.80 > 10.72.192.61.50693: Flags [S.], 
seq
326259738, ack 1299448389, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:41.409101 IP 10.72.192.61.50697 > 199.47.218.151.80: Flags 
[S], seq
3043000771, win 8192, options [mss 1460,nop,wscale 
2,nop,nop,sackOK], length
0
11:38:41.409164 IP 199.47.218.151.80 > 10.72.192.61.50697: Flags 
[S.],
seq 3389808826, ack 3043000772, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:41.556343 IP 176.9.44.80.80 > 10.72.192.61.50694: Flags [S.], 
seq
2634200113, ack 3423797704, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:41.756336 IP 199.47.218.151.80 > 10.72.192.61.50697: Flags 
[S.],
seq 3389808826, ack 3043000772, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:41.756362 IP 209.85.148.139.80 > 10.72.192.61.50695: Flags 
[S.],
seq 2040290141, ack 953271924, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0
11:38:42.356340 IP 209.85.148.139.80 > 10.72.192.61.50696: Flags 
[S.],
seq 69242255, ack 3941278742, win 14600, options [mss
1460,nop,nop,sackOK,nop,wscale 4], length 0

i still can't get linux to redirect to squid (port 8080), 
access.log is
empty

i use the following iptables

-------------------------------------------------------------------------
# Generated by iptables-save v1.4.12.1 on Wed Jul 25 11:36:37 2012
*filter
:INPUT ACCEPT [105007:140596865]
:FORWARD ACCEPT [3:120]
:OUTPUT ACCEPT [212743:136992211]
-A INPUT -p tcp -m tcp --dport 8080 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
COMMIT
# Completed on Wed Jul 25 11:36:37 2012
# Generated by iptables-save v1.4.12.1 on Wed Jul 25 11:36:37 2012
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [1254:65132]
:OUTPUT ACCEPT [118:7345]
:POSTROUTING ACCEPT [0:0]
-A PREROUTING -d $SQUID_IP -i eth0 -p tcp -j ACCEPT
-A PREROUTING -s $NETWORK_SPACE -i eth0 -p tcp -m tcp --dport 80 -j
REDIRECT --to-ports 8080
-A POSTROUTING -j MASQUERADE
COMMIT
# Completed on Wed Jul 25 11:36:37 2012

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

Catch is that i use l2 redirection, so source and destination is 
eth0, no
gre tunnel. Can it be done or should a create a virtual device and 
redirect
input from there?

Thank you in advance
John

--
Thank you
Indunil Jayasooriya

--
Thank you
Indunil Jayasooriya