root@OpenWrt:/# iptables -t mangle -L -vn
Chain PREROUTING (policy ACCEPT 19854 packets, 12M bytes)
 pkts bytes target     prot opt in     out     source               destination
 8797   11M Default    all  --  eth0   *       0.0.0.0/0            0.0.0.0/0
 8796   11M IMQ        all  --  eth0   *       0.0.0.0/0            0.0.0.0/0           IMQ: todev 0

Chain INPUT (policy ACCEPT 331 packets, 36847 bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain FORWARD (policy ACCEPT 19035 packets, 12M bytes)
 pkts bytes target     prot opt in     out     source               destination
10677  765K Default    all  --  *      eth0    0.0.0.0/0            0.0.0.0/0

Chain OUTPUT (policy ACCEPT 198 packets, 23906 bytes)
 pkts bytes target     prot opt in     out     source               destination
  100  8371 Default    all  --  *      eth0    0.0.0.0/0            0.0.0.0/0

Chain POSTROUTING (policy ACCEPT 19214 packets, 12M bytes)
 pkts bytes target     prot opt in     out     source               destination

Chain Default (3 references)
 pkts bytes target     prot opt in     out     source               destination
19574   12M Default_ct  all  --  *      *       0.0.0.0/0            0.0.0.0/0           MARK match 0x0
    0     0 MARK       all  --  *      *       0.0.0.0/0            0.0.0.0/0           MARK match 0x1 length 400:65535 MARK
    0     0 MARK       all  --  *      *       0.0.0.0/0            0.0.0.0/0           MARK match 0x2 length 800:65535 MARK

Chain Default_ct (1 references)
 pkts bytes target     prot opt in     out     source               destination