Hello all: Now,i am using Netfilter as gateway of a LAN,and I would like to account the traffic for each IP of LAN. As we know,IPtables could report the traffic counter of each chain with "iptables -nvL FORWARD". Now,I creat a new chain in filter table for each IP.When a packet traverse the FORWARD chain ,I let them jump to the chain for each IP firstly, such as: $IPTABLES -N lltj1 $IPTABLES -N lltj2 $IPTABLES -N lltj3 $IPTABLES -N lltj4 $IPTABLES -N lltj5 $IPTABLES -N lltj6 $IPTABLES -N lltj7 $IPTABLES -N lltj8 $IPTABLES -N lltj9 $IPTABLES -A FORWARD -s 117.1.1.1 -j lltj1 $IPTABLES -A FORWARD -d 117.1.1.1 -j lltj1 $IPTABLES -A FORWARD -s 117.1.1.3 -j lltj3 $IPTABLES -A FORWARD -d 117.1.1.3 -j lltj3 $IPTABLES -A FORWARD -s 117.1.1.4 -j lltj4 $IPTABLES -A FORWARD -d 117.1.1.4 -j lltj4 $IPTABLES -A FORWARD -s 117.1.1.5 -j lltj5 $IPTABLES -A FORWARD -d 117.1.1.5 -j lltj5 $IPTABLES -A FORWARD -s 117.1.1.10 -j lltj6 $IPTABLES -A FORWARD -d 117.1.1.10 -j lltj6 $IPTABLES -A FORWARD -s 117.1.1.177 -j lltj7 $IPTABLES -A FORWARD -d 117.1.1.177 -j lltj7 $IPTABLES -A FORWARD -s 117.1.1.133 -j lltj9 $IPTABLES -A FORWARD -d 117.1.1.133 -j lltj9 $IPTABLES -A FORWARD -s 117.1.1.8 -j lltj8 $IPTABLES -A FORWARD -d 117.1.1.8 -j lltj8 Each chain for every IP is empty,and the packet just traverse the chain without any action. After executing the scripts, using: iptables -nvL FORWARD,I get the following messages: 0 0 lltj3 all -- any any 117.1.1.3 anywhere 0 0 lltj3 all -- any any anywhere 117.1.1.3 4257 268K lltj4 all -- any any 117.1.1.4 anywhere 2217 1059K lltj4 all -- any any anywhere 117.1.1.4 20780 1217K lltj5 all -- any any 117.1.1.5 anywhere 32338 34M lltj5 all -- any any anywhere 117.1.1.5 21374 988K lltj6 all -- any any 117.1.1.10 anywhere 15988 5648K lltj6 all -- any any anywhere 117.1.1.10 852 118K lltj7 all -- any any 117.1.1.177 anywhere 937 202K lltj7 all -- any any anywhere 117.1.1.177 1473 132K lltj9 all -- any any 117.1.1.133 anywhere 1738 476K lltj9 all -- any any anywhere 117.1.1.133 8907 535K lltj8 all -- any any 117.1.1.8 anywhere 7638 1874K lltj8 all -- any any anywhere 117.1.1.8 In fact,I could get some data about traffic. But now,I would like to know whether these data are right or exact ? if they are reliable, I could do other work on base of these data. Thanks