[求助]在redhat el4 下执行iptables出错(No chain/target/match by that name)

没什么

iptables: No chain/target/match by that name
   ERROR: Command "/sbin/iptables -t mangle -A PREROUTING -m connmark ! --mark 0 -j CONNMARK --restore-mark" Failed




以上是出错信息,我用的是默认安装的RedHat el4
内核版本inux localhost.localdomain 2.6.9-22.ELsmp #1 SMP Mon Sep 19 18:32:14 EDT 2005 i686 i686 i386 GNU/Linux
iptables版本iptables-1.2.11-3.1.RHEL4

请各位达人指点一二,谢谢