Re: debug iptables rules

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Hi,

As per your suggestion, i set LOG options after DIVERT MARK rule and
TPROXY rule and i can see logs of traffic.But

I configure rule of tproxy for dport 80 to redirect to port 3129 for
tcp but when i check log messages , it is showing for UDP and for port
53 which is DNS one.

and in socket log prefix i can see dport 80 log messagess.

my iptables rules:


cat /etc/sysconfig/iptables
# Generated by iptables-save v1.4.7 on Mon Aug 22 23:16:10 2011
*mangle
:PREROUTING ACCEPT [55:7813]
:INPUT ACCEPT [3019:751575]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [2731:1227997]
:POSTROUTING ACCEPT [2731:1227997]
:DIVERT - [0:0]
-A PREROUTING -p tcp -m socket -j DIVERT
-A PREROUTING -p tcp -m tcp --dport 80 -j TPROXY --on-port 3129
--on-ip 0.0.0.0 --tproxy-mark 0x1/0x1
-A PREROUTING -j LOG --log-prefix "TPROXY PACKET" --log-level 1
-A DIVERT -j MARK --set-xmark 0x1/0xffffffff
-A DIVERT -j LOG --log-prefix "SOCKET packets" --log-level 1
-A DIVERT -j ACCEPT


Thanks,
Tej
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