https://forum.andowson.com/posts/list/16.page JForum - http://www.jforum.net
錯誤訊息大致如下：
[quote][root@eip2 root]# iptables -L -n
/lib/modules/2.4.20-28.7/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters
/lib/modules/2.4.20-28.7/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.20-28.7/kernel/net/ipv4/netfilter/ip_tables.o failed
/lib/modules/2.4.20-28.7/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed
iptables v1.2.8: can't initialize iptables table `filter': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.[/quote]

連重新安裝iptables也無效 :(

後來找到下列這篇文章，終於找到解法了：
http://phorum.study-area.org/index.php?topic=13185.0

因為Red Hat 7.3內建了ipchains及iptables 2種firewall。而且用chkconfig --list | grep ip 去查，發現在啟動時2個都有設為啟動，不過似乎ipchains會比iptables優先啟動。
解決方式如下：
將ipchains給disable掉
chkconfig ipchains off
然後再重新開機(不重新開機沒辦法關閉ipchains)，就可以了。]]> https://forum.andowson.com/posts/preList/450/919.page https://forum.andowson.com/posts/preList/450/919.page GMT