iptables防火墙设置的问题！

kemean

我为了局域网中的机器能够访问我，就改了/etc/sysconfig/iptables，此文件没改之前内容如下：

# Firewall configuration written by lokkit
# Manual customization of this file is not recommended.
# Note: ifup-post will punch the current nameservers through the
#       firewall; such entries will *not* be listed here.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:RH-Lokkit-0-50-INPUT - [0:0]
-A INPUT -j RH-Lokkit-0-50-INPUT
-A FORWARD -j RH-Lokkit-0-50-INPUT
-A RH-Lokkit-0-50-INPUT -i lo -j ACCEPT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 0:1023 --syn -j REJECT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 2049 --syn -j REJECT
-A RH-Lokkit-0-50-INPUT -p udp -m udp --dport 0:1023 -j REJECT
-A RH-Lokkit-0-50-INPUT -p udp -m udp --dport 2049 -j REJECT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 6000:6009 --syn -j REJECT
-A RH-Lokkit-0-50-INPUT -p tcp -m tcp --dport 7100 --syn -j REJECT
COMMIT

我将其修改成：
# Firewall configuration written by lokkit
# Manual customization of this file is not recommended.
# Note: ifup-post will punch the current nameservers through the
#       firewall; such entries will *not* be listed here.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
COMMIT

重启之后，在Starting Sendmain那里就等了很久，特慢，所以我又重设了防火墙，使其跟开始时一样了，但是再重启的时候，还是在Starting Sendmail那里，奇慢无比，请问该怎么解决？

pys

请教一下
RH-Lokkit-0-50-INPUT 是什么意思？

kemean

不好意思，这个我也不懂，里面本来就是这样写的啊

solaris

RH-Lokkit-0-50-INPUT是一个自定义链，
-A INPUT -j RH-Lokkit-0-50-INPUT这句表示所有INPUT数据包转到该链
而后面一堆则是具体的该链的详细规则。

solaris

新的IPtables好像跟以前又有变化了，看不太懂了