我的redhat---
distributor ID: redhatenterpriseAS
description: red hat enterprise linux as release 4 (nahant update 2)
release: 4
codename: nahantupdate2
uname -a
linux hostname 2.6.9-22.EL
iptables v1.2.11
照书打命令每一个成功：
#iptables -A input -p icmp -j DROP
iptables: no chain/target/match by that name
#iptables -A input -p icmp -j ACCEPT
iptables: no chain/target/match by that name
#iptables -A input -p icmp -j FORWARD
iptables: no chain/target/match by that name
网上看了很多，说是要添模块还是什麽的，想有没有重装iptables的方法可试试？一直没找到这样的信息。
哪位能帮帮忙？
