These three chains are the main chains built-in by default inside basic packet-filtering tables.
这三个链是基本信息包过滤表中内置的缺省主链。
The software of packet-filtering, which is based on the addresses of datagram, is realized after a discussion on the advantages and disadvantages of packet-filtering.
本文讨论了包过滤的优缺点，并实现了基于报文地址的包过滤功能。
Now you've learned how to build basic rules and chains and how to add or remove them from the packet filtering tables.
现在，您已经学习了如何建立基本的规则和链以及如何从信息包过滤表中添加或删除它们。
After the rules are built and chains are in place, the real work of packet filtering starts.
建立规则并将链放在适当的位置之后，就可以开始进行真正的信息包过滤工作了。
A table is a packet filtering table that contains rules and chains dealing with specific kinds of packets only.
表是包含仅处理特定类型信息包的规则和链的信息包过滤表。
Out of the box, the appliance is set to let all traffic pass, leaving the user to specify which types of traffic are blocked (via packet filtering).
盒子之外，设备被设为允许任何流量通过，让用户指定阻塞哪些流量(通过包过滤)。
Figure 1 graphically illustrates this packet filtering process.
图1用图形说明了这个信息包过滤过程。
The filter table is used for general packet filtering and consists of INPUT, OUTPUT, and FORWARD chains.
filter表用于一般的信息包过滤，它包含INPUT、OUTPUT和forward链。
This process is known as packet filtering.
我们将该过程称为信息包过滤。
These rules are stored in special-purpose packet filtering tables integrated in the Linux kernel.
这些规则存储在专用的信息包过滤表中，而这些表集成在Linux内核中。
To defend against network attacks through packet filtering and the enforcement of trusted communication.
通过数据包筛选和执行信任通信来抵御网络攻击。
Applying median filtering will effectively reduce the impulse noise, which can combine wavelet packet transform and median filter.
将子波包变换和中值滤波相结合，可以有效地降低图像噪声。
At the same time, NP needs to classify the coming packet and satisfy some new complex network applications, such as filtering the packet, differentiated qualities of service, QoS, Multicast and so on.
另外一些新的网络应用如数据包过滤、区分服务、服务质量、多播、流量计费等，都需要NP对到达的数据包进行分类。
Introducing the decision tree classifiers into packet filtering technology, it changes the conventional method searching the packet orderly.
把决策树分类器引入包过滤技术当中，改变了传统的顺序检索包过滤的方法。
This paper firstly introduces the packet filtering system briefly and presents necessity of RPC protocol.
首先对报文过滤系统做简单介绍，提出RPC协议存在的必要性；
Three, restrictions based on packet filtering, or the prohibition of a number of keywords.
基于包过滤的限制，或者禁止了一些关键字。
The thesis researches an algorithm based on decision tree classifier for packet filtering.
本文提出了一种基于决策树分类器的数据包分类算法。
Chapter 5 and chapter 6 implements some security functions based on the basic data path implemented in the chapter 4, they are packet filtering and network address transition (NAT).
第五章和第六章分别在第四章所实现的基本数据通路的基础上实现了一些安全特性，它们是包过滤和网络地址转换(NAT)。
The result shows that the filtering algorithm based on wavelet packet analysis can decrease the random error and improve the measuring precision of laser gyro effectively.
结果表明基于小波包分析的滤波方法能有效减小随机误差，提高激光陀螺的测量精度。
When you run SQL Server on a computer located behind Proxy Server, SQL Server is protected by the packet filtering features of Proxy Server.
在代理服务器后面的计算机上运行的SQL服务器，可受到代理服务器的包过滤功能的保护。
The intelligent E-mail processing, which is based on the packet filtering and protocol analysis, makes the encryption and signature intelligent.
智能邮件信息处理基于数据包过滤和协议分析处理技术，实现了邮件加密，签名的智能化。
The intelligent E-mail processing, which is based on the packet filtering and protocol analysis, makes the encryption and signature intelligent.
智能邮件信息处理基于数据包过滤和协议分析处理技术，实现了邮件加密，签名的智能化。
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