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发信人: zixia (Do you zixia tonight), 信区: Linux
标  题: 1. Introduction
发信站: BBS 水木清华站 (Wed Oct 11 01:16:23 2000) WWW-POST

                                 Linux 2.4 Packet Filtering HOWTO:
Introduction
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1. Introduction

   Welcome, gentle reader.

   It is assumed you know what an IP address, a network address, a netmask,
   routing and DNS are. If not, I recommend that you read the Network
   Concepts HOWTO.

   This HOWTO flips between a gentle introduction (which will leave you
   feeling warm and fuzzy now, but unprotected in the Real World) and raw
   full-disclosure (which would leave all but the hardiest souls confused,
   paranoid and seeking heavy weaponry).

   Your network is not secure. The problem of allowing rapid, convenient
   communication while restricting its use to good, and not evil intents is
   congruent to other intractable problems such as allowing free speech
while
   disallowing a call of ``Fire!'' in a crowded theater. It will not be
   solved in the space of this HOWTO.

   So only you can decide where the compromise will be. I will try to
   instruct you in the use of some of the tools available and some
   vulnerabilities to be aware of, in the hope that you will use them for
   good, and not evil purposes. Another equivalent problem.

   (C) 2000 Paul `Rusty' Russell. Licenced under the GNU GPL.

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