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Linux操作系统主要应用于服务器领域,是入侵者进行攻击的首选目标。如何检测入侵和保护系统安全是管理员最重要的任务之一。为此,本文对Linux系统入侵的安全防范进行了分析并提出了相关的方法。 相似文献
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Linux 是目前使用十分广泛、流行的网络操作系统,随着网络服务器对安全性要求的不断增大,如何有效地防御针对 Linux 服务器的入侵和攻击已成为系统管理员不容忽视的问题。该文针对 Linux 服务器存在的几类安全问题, 给出了一些增强 Linux 服务器安全性的实用配置经验和技巧、常用的入侵检测方法以及遭受入侵后应采取的措施。 相似文献
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王秀利 《计算机工程与应用》2008,44(36):115-118
提出一种基于流量监控的针对Web服务的DDoS攻击防范机制。使用Linux内核的安全选项、Linux虚拟服务器、iptables防火墙以及基于类的排队等技术搭建防范DDoS攻击的Web服务器系统环境,设计、实现了流量监控器和分析工具来检测可能发生的DDoS攻击,并降低其危害。实际测试表明,该机制能有效检测和防范常见的针对Web服务的DDoS攻击。 相似文献
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杨立震 《计算机光盘软件与应用》2014,(21):169+171
本文阐述了计算机网络安全漏洞的一些类别,分析了安全配置交换机、安全配置路由器、设置计算机、安全配置Windows服务器及Linux服务器等计算机网络安全漏洞的防护技术。我们认为,只能通过采取适合地漏洞处理措施,才可以提高网络的应用安全,避免其受到外部的攻击。 相似文献
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唐友 《网络安全技术与应用》2010,(5):56-58
在Internet网络上,安全的通讯一直都是组织及个人最为重视的一环,对于安全通讯的高度需求也造成一股研究linux安全服务器的风潮。本文以Linux作为系统的一些应用,并学习如何架设各种服务器的技巧。实现了一个集Linux防火墙和代理服务为一体的安全系统,不仅保护了Linux服务器的安全,而且也有效地保证了整个内部网络资源的安全。 相似文献
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Apacheweb具有良好的跨平台性和极强的可扩展性,功能强大。虽然Apache也存在诸如拒绝服务攻击、缓冲区溢出攻击、非法获得root权限等安全缺陷。讨论了从Linux系统的安全入手并加强Apache服务器的配置,对安全漏洞采取积极的防范措施,从而提高Apacheweb安全性的方法。 相似文献
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随着Internet的迅速发展和普及,网络在给用户提供方便的同时,也给了恶意攻击者提供机会。Linux内核防火墙实现了一种性价比较高的安全方案,有效地阻止恶意攻击,成了很多网络安全管理员的选择。本文首先介绍防火墙的主要技术,然后详细介绍Linux内核防火墙netfilter/iptables的实现原理,最后结合实例详细说明如何利用Linux内核netfilter和 iptables工具构建防火墙,保护服务器的安全。 相似文献
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Cybernetics and Systems Analysis - 相似文献
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V. I. Donskoy 《Cybernetics and Systems Analysis》2012,48(2):233-241
The paper presents a general approach to the evaluation of the complexity of classes of algorithms, so-called pVCD-method. To develop this method, all the examined families of models of empiric generalization were restricted to classes
implementable on computers and, wider, by examining their partially recursive representations. Within the framework of the
algorithmic approach, the concept of Kolmogorov’ complexity of algorithms for the recognition of properties or the extraction
of regularities is proposed. The method proposed to evaluate the nonrandomness of the extraction of empirical regularities
is based on this concept. 相似文献
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对国网宁夏电力检修公司宁安运维站近2年来一次设备喷涂PRTV用量的统计数据进行分析整理,得出各类一次设备按照标准要求喷涂PRTV时的用量估算值,并针对现存作业中存在的问题,提出相应解决方案。 相似文献
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Computer-aided analysis of autoradiographic films of DNA fragments is presented. The Powell least-squares procedure is used for optimization of parameters for components of complex densitometric curves. Since each densitometric spectrum may be divided for several non-overlapped blocks of bands, there is no upper limit on the number of parameters which must be optimized. Eight shapes for the component bands are utilized: symmetric and asymmetric Gauss and Cauchy functions, direct, symmetric and asymmetric product of Gauss function and inverse of Cauchy function, and log-normal function. The probability of DNA cleavage is calculated with correction for multiple cuts. The methods presented was applied to detailed analysis of densitometric spectra of a 21-bp DNA restriction fragment and allowed for direct correlation between structural microheterogeneity of DNA and the resulting cutting pattern. This method should facilitate the analysis of densitometric data from antibiotic-induced cleavage of DNA and footprinting experiments. 相似文献
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《Computers & Mathematics with Applications》2001,41(5-6):571-578
In this paper, we study the semicycles of oscillatory solutions of the delay difference equation yn+1 − yn + pnyn-k = 0, where pn is a sequence of nonnegative real numbers and k is a positive integer. Upper bound of numbers of terms of semicycles are determined in the case when Our results improve and complement known results in literature. 相似文献
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The problem to find a 4-edge-coloring of a 3-regular graph is solvable in polynomial time but an analogous problem for 3-edge-coloring is NP-hard. To make the gap more precise, we study complexity of approximation algorithms for invariants measuring how far is a 3-regular graph from having a 3-edge-coloring. We show that it is an NP-hard problem to approximate such invariants with an error O(n1−ε), where n denotes the order of the graph and 0<ε<1 is a constant. 相似文献
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《Computers & Mathematics with Applications》2006,51(3-4):451-466
In spite of being a classical method for solving differential equations, the method of variation of parameters continues having a great interest in theoretical and practical applications, as in astrodynamics. In this paper we analyse this method providing some modifications and generalised theoretical results. Finally, we present an application to the determination of the ephemeris of an artificial satellite, showing the benefits of the method of variation of parameters for this kind of problems. 相似文献