環境：ubuntu 10.10

目標：配置網卡啟動時加載iptables規則

網絡上搜到的各種操作：

sh -c iptables-save > /etc/iptables.rules

vi /etc/network/interfaces

## 目標網卡下增加一條命令

## pre-up iptables-restore /etc/iptables.rules

但是，經測試發現。重啟后這些配置會丟失，查看這個文件頭會發現。

# This configuration file is auto-generated.

# WARNING: Do not edit this file, your changes will be lost.

# Please create/edit /etc/network/interfaces.head and /etc/network/interfaces.tail instead,

# their contents will be inserted at the beginning and at the end

# of this file, respectively.

#

# NOTE: it is NOT guaranteed that the contents of /etc/network/interfaces.tail

# will be at the very end of this file.

文件寫得很明確，/etc/network/interfaces是自動生成的。如果我們需要自定義配置，那就創建/etc/network/interfaces.head或/etc/network/interfaces.tail。其中/etc/network/interfaces.tail并不推薦。

以下是一個示例：

auto venet0:0

iface venet0:0 inet static

address 184.22.224.125

netmask 255.255.255.0

pre-up iptables-restore /etc/iptables.rules