如何获取所有 IPtables 规则

Question

我正在尝试查看 Debian 7 服务器中 IPtables 中所有规则的列表。当我尝试：

iptables -L -n

我只得到一个规则（我在 5 分钟前输入）。

我还有很多其他端口，例如 80 端口、mysql 和其他端口，它们都可以正常工作，但我在任何地方都看不到它们。

知道怎么做吗？谢谢

/* 编辑 */

我正在添加一些从不同命令中获得的输入

iptables -t nat -L -n

Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

当我尝试

iptables -L -v -n --line-n

Chain INPUT (policy ACCEPT 43535 packets, 58M bytes)
num   pkts bytes target     prot opt in     out     source               destination
1      126 56529 ACCEPT     tcp  --  eth0   *       0.0.0.0/0            0.0.0.0/0            tcp spt:443 state ESTABLISHED

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
num   pkts bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 30151 packets, 7365K bytes)
num   pkts bytes target     prot opt in     out     source               destination


iptables-save


# Generated by iptables-save v1.4.14 on Thu Oct 23 08:58:32 2014
*raw
:PREROUTING ACCEPT [17972:25607074]
:OUTPUT ACCEPT [12416:1953400]
COMMIT
# Completed on Thu Oct 23 08:58:32 2014
# Generated by iptables-save v1.4.14 on Thu Oct 23 08:58:32 2014
*mangle
:PREROUTING ACCEPT [19071:27028289]
:INPUT ACCEPT [19071:27028289]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [13114:2110189]
:POSTROUTING ACCEPT [13114:2110189]
COMMIT
# Completed on Thu Oct 23 08:58:32 2014
# Generated by iptables-save v1.4.14 on Thu Oct 23 08:58:32 2014
*security
:INPUT ACCEPT [19514:27565428]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [13405:2178341]
COMMIT
# Completed on Thu Oct 23 08:58:32 2014
# Generated by iptables-save v1.4.14 on Thu Oct 23 08:58:32 2014
*nat
:PREROUTING ACCEPT [141:11461]
:INPUT ACCEPT [141:11461]
:OUTPUT ACCEPT [11:1030]
:POSTROUTING ACCEPT [11:1030]
COMMIT
# Completed on Thu Oct 23 08:58:32 2014
# Generated by iptables-save v1.4.14 on Thu Oct 23 08:58:32 2014
*filter
:INPUT ACCEPT [43596:58181078]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [30216:7394285]
-A INPUT -i eth0 -p tcp -m tcp --sport 443 -m state --state ESTABLISHED -j ACCEP                                                                                        T
COMMIT
# Completed on Thu Oct 23 08:58:32 2014

Answer 1

Netfilter 鼓励使用iptables-save命令，因为它会为您提供内置链和您自己定义的链的详细视图。如果您想获得人类可读的视图，您可以使用 iptables -L -v -n --line-n

Answer 2

您的命令仅列出默认filter表。共有五个表是：filter，nat，mangle，raw和security。可以使用以下-t选项选择这些：

iptables -t nat -L -n