for kernel 2.4.x
CONFIG_NET_SCHED=y CONFIG_NETLINK=y CONFIG_NET_SCH_INGRESS=y CONFIG_NET_QOS=y CONFIG_NET_CLS=y CONFIG_NET_CLS_FW=y CONFIG_NET_CLS_POLICE=y CONFIG_IP_NF_IPTABLES=y CONFIG_IP_NF_MANGLE=y CONFIG_IP_NF_TARGET_MARK=y