- Updated Debian SID x86 32 bit
- kernel 2.6.33.2-rt13
- iptables v1.4.6
I've experimented some problems while displaying processed packets by
iptables ( iptables -L -n -v ). The output displays a large number of
processed packets with a very low network activity in my LAN ( max 1
hundred of packets delivered )
A sample output obtained after loading iptables rules and quite
immediately running iptables -L -n -v
Chain bad_packets (1 references)
pkts bytes target prot opt in out source destination
8600M 15024815T LOG all -- * * 0.0.0.0/0 0.0.0.0/0
state INVALID LOG flags 0 level 4 prefix `fp=bad_packets:1 a=DROP '
15024815T 15066474T DROP all -- * * 0.0.0.0/0
0.0.0.0/0 state INVALID
13777492T 15024815T bad_tcp_packets tcp -- * * 0.0.0.0/0
0.0.0.0/0
1337099T 7793M RETURN all -- * * 0.0.0.0/0 0.0.0.0/0
Chain bad_tcp_packets (1 references)
pkts bytes target prot opt in out source destination
4295M 0 LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp
flags:!0x17/0x02 state NEW LOG flags 0 level 4 prefix
`fp=bad_tcp_packets:1 a=DROP '
41659T 288230T DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:!0x17/0x02 state NEW
41659T 257832T LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x00 LOG flags 0 level 4 prefix
`fp=bad_tcp_packets:2 a=DROP '
41659T 144115T DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x00
41659T 352428T LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x3F LOG flags 0 level 4 prefix
`fp=bad_tcp_packets:3 a=DROP '
72059T 13835076T DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x3F
72059T 15024832T LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x29 LOG flags 0 level 4 prefix
`fp=bad_tcp_packets:4 a=DROP '
113717T 72074T DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x29
72059T 155G LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x3F/0x37 LOG flags 0 level 4 prefix `fp=bad_tcp_packets:5
a=DROP '
3498M 0 DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp
flags:0x3F/0x37
0 15T LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x06/0x06 LOG flags 0 level 4 prefix `fp=bad_tcp_packets:6
a=DROP '
72059T 4305M DROP tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x06/0x06
15024815T 8600M LOG tcp -- * * 0.0.0.0/0 0.0.0.0/0
tcp flags:0x03/0x03 LOG flags 0 level 4 prefix
`fp=bad_tcp_packets:7 a=DROP '
15024815T 15024815T DROP tcp -- * * 0.0.0.0/0
0.0.0.0/0 tcp flags:0x03/0x03
15066474T 15782 RETURN tcp -- * * 0.0.0.0/0 0.0.0.0/0
The problem doesn't occur with other kernels ( vanilla 2.6.33.2 ,
2.6.33-zen1 ) and the number of processed packets is displayed correctly.
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