IPFilter

此條目介紹的是类Unix上的IPFilter项目。关于P2P软件和部分防火墙的IP过滤功能，请见「IPFilter (P2P)」。
IPFilter（ipf）
開發者Darren Reed
当前版本5.1.2（2012年7月22日）
源代码库
編輯維基數據鏈接
操作系统FreeBSD、NetBSD、OpenBSD、Solaris、Linux、HP-UX等
类型过滤包
许可协议版本4.1.35以及5.1.1之前：自己的协议，自从版本4.1.35以及5.1.1：GNU GPL v2[註 1]
网站https://www.phildev.net/ipf/

IPFilter（通用簡稱：ipf）是一个开源的软件项目，可以为类Unix操作系统提供防火墙和网络地址转换（NAT）服务。

IPFilter目前仍在一些Unix類作業系統中使用，例如illumos、NetBSD、FreeBSD。


目的

格式

IPFilter的配置檔案名稱通常為 /etc/ipf.rules，是一個純文字檔案，但內容僅可使用英文、阿拉伯數字、半形標點符號。

其中的规则由 [block/pass]，[out/in]，[log] [quick] [on 網路介面]，[proto tcp/udp...]，[from 來源IP地址 to 目的IP地址] 等多個項目依序構成，分別以空格為分界。

  • IP地址可使用 any 或点分十进制數字，以32位地址表示區段或單一主機，區段由小于32的前缀长度指定。
  • 前缀长度僅可使用十进制數字，範圍由0到32。

範例

block in quick on em0 from 10.0.0.4/24 to any

（阻擋來源為10.0.0.4的進入封包） 

pass out all

（出去封包皆不阻擋）

注释

  1. ^ 具体的许可文本可在其源码目录的“IPFILTER.LICENCE”文件中找到。作者在稍后也为FreeBSD计划以原有的许可协议许可了版本5.1.2[1]。

另见

参考

  1. ^ FreeBSD base Revision 254219. [2020年6月8日]. （原始内容存档于2020年5月7日）. 

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