第四部分：网络通讯
==================

FreeBSD 是最广泛部署的高性能网络服务器的操作系统之一。这一部分的章节包括：

-  串行通信

-  ``PPP`` 和基于以太网的 ``ppp``

-  电子邮件

-  运行网络服务器

-  防火墙

-  其他高级网络话题

这些章节是为了在需要时查阅而设计的。它们不需要按照任何特定的顺序进行阅读，也没有必要在网络环境中使用 FreeBSD 之前阅读所有的章节。

第二十九章 串行通信
-------------------

.. toctree::
   :maxdepth: 1

   di-29-zhang-chuan-hang-tong-xin/29.1.-gai-shu
   di-29-zhang-chuan-hang-tong-xin/29.2.-chuan-hang-shu-yu-he-ying-jian
   di-29-zhang-chuan-hang-tong-xin/29.3.-zhong-duan
   di-29-zhang-chuan-hang-tong-xin/29.4.-bo-ru-fu-wu
   di-29-zhang-chuan-hang-tong-xin/29.5.-bo-chu-fu-wu
   di-29-zhang-chuan-hang-tong-xin/29.6.-she-zhi-chuan-hang-kong-zhi-tai

第三十章 PPP
------------

.. toctree::
   :maxdepth: 1

   di-30-zhang-ppp/30.1.-gai-shu
   di-30-zhang-ppp/30.2.-pei-zhi-ppp
   di-30-zhang-ppp/30.3.-ppp-lian-jie-de-gu-zhang-pai-chu
   di-30-zhang-ppp/30.4.-shi-yong-yi-tai-wang-ppppppoe
   di-30-zhang-ppp/30.5.-shi-yong-atm-shang-de-ppp-pppoa

第三十一章 电子邮件
-------------------

.. toctree::
   :maxdepth: 1

   di-31-zhang-dian-zi-you-jian/31.1.-gai-shu
   di-31-zhang-dian-zi-you-jian/31.2.-you-jian-zu-jian
   di-31-zhang-dian-zi-you-jian/31.3.-sendmail-pei-zhi-wen-jian
   di-31-zhang-dian-zi-you-jian/31.4.-gai-bian-you-jian-chuan-shu-dai-li
   di-31-zhang-dian-zi-you-jian/31.5.-gu-zhang-pai-chu
   di-31-zhang-dian-zi-you-jian/31.6.-gao-ji-zhu-ti
   di-31-zhang-dian-zi-you-jian/31.7.-she-zhi-wei-jin-fa-song
   di-31-zhang-dian-zi-you-jian/31.8.-zai-bo-hao-lian-jie-zhong-shi-yong-you-jian
   di-31-zhang-dian-zi-you-jian/31.9.-smtp-ren-zheng
   di-31-zhang-dian-zi-you-jian/31.10.-you-jian-yong-hu-dai-li
   di-31-zhang-dian-zi-you-jian/31.11.-shi-yong-fetchmail
   di-31-zhang-dian-zi-you-jian/31.12.-shi-yong-procmail

第三十二章 网络服务器
---------------------

.. toctree::
   :maxdepth: 1

   di-32-zhang-wang-luo-fu-wu-qi/32.1.-gai-shu
   di-32-zhang-wang-luo-fu-wu-qi/32.2.-inetd-chao-ji-fu-wu-qi
   di-32-zhang-wang-luo-fu-wu-qi/32.3.-wang-luo-wen-jian-xi-tong-nfs
   di-32-zhang-wang-luo-fu-wu-qi/32.4.-wang-luo-xin-xi-xi-tong-nis
   di-32-zhang-wang-luo-fu-wu-qi/32.5.-qing-xing-mu-lu-fang-wen-xie-yi-ldap
   di-32-zhang-wang-luo-fu-wu-qi/32.6.-dong-tai-zhu-ji-she-zhi-xie-yi-dhcp
   di-32-zhang-wang-luo-fu-wu-qi/32.7.-yu-ming-xi-tong-dns
   di-32-zhang-wang-luo-fu-wu-qi/32.8.-apache-http-fu-wu-qi
   di-32-zhang-wang-luo-fu-wu-qi/32.9.-wen-jian-chuan-shu-xie-yi-ftp
   di-32-zhang-wang-luo-fu-wu-qi/32.10.-yong-yu-microsoft-windows-ke-hu-duan-de-wen-jian-he-da-yin-fu-wu-samba
   di-32-zhang-wang-luo-fu-wu-qi/32.11.-yong-ntp-jin-hang-shi-zhong-tong-bu
   di-32-zhang-wang-luo-fu-wu-qi/32.12.-iscsi-target-he-initiator-de-pei-zhi

第三十三章 防火墙
-----------------

.. toctree::
   :maxdepth: 1

   di-33-zhang-fang-huo-qiang/33.1.-gai-shu
   di-33-zhang-fang-huo-qiang/33.2.-fang-huo-qiang-de-gai-nian
   di-33-zhang-fang-huo-qiang/33.3.-pf
   di-33-zhang-fang-huo-qiang/33.4.-ipfw
   di-33-zhang-fang-huo-qiang/33.5.-ipfilter-ipf
   di-33-zhang-fang-huo-qiang/33.6.-blacklistd

第三十三章 高级网络
-------------------

.. toctree::
   :maxdepth: 1

   di-34-zhang-gao-ji-wang-luo/34.1.-gai-shu
   di-34-zhang-gao-ji-wang-luo/34.2.-wang-guan-he-lu-you
   di-34-zhang-gao-ji-wang-luo/34.3.-xu-ni-zhu-ji
   di-34-zhang-gao-ji-wang-luo/34.4.-wu-xian-gao-ji-shen-fen-yan-zheng
   di-34-zhang-gao-ji-wang-luo/34.5.-wu-xian-dian-dui-dian-mo-shi
   di-34-zhang-gao-ji-wang-luo/34.6.-usb-wang-luo-gong-xiang
   di-34-zhang-gao-ji-wang-luo/34.7.-lan-ya
   di-34-zhang-gao-ji-wang-luo/34.8.-qiao-jie
   di-34-zhang-gao-ji-wang-luo/34.9.-lian-lu-ju-he-yu-gu-zhang-zhuan-yi
   di-34-zhang-gao-ji-wang-luo/34.10.-shi-yong-pxe-jin-hang-wu-pan-cao-zuo
   di-34-zhang-gao-ji-wang-luo/34.11.-gong-yong-di-zhi-rong-yu-xie-yi-carp
   di-34-zhang-gao-ji-wang-luo/34.12.-vlan