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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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81

OpenVPN Installation Guidelines for Linux and Unix Systems

Installing OpenVPN is easy and platform independent. Modern Linux systems, such as SuSE, Red Hat, Debian, or Ubuntu, provide sophisticated installation and package management systems, and still offer other ways to install the software. In this two-part article by Markus Feilner, we will install it on different Linux versions and FreeBSD.. All Linux/Unix systems must meet the following requirements to install OpenVPN successfully: Your system must provide support for the Universal TUN/TAP driver. The kernels newer than version 2.4 of almost all modern Linux distributions provide support for TUN/TAP devices. Only if you are using an old distribution or if you have built your own kernel, will you have to add this support to your configuration. This project's web site can be found at https://vtun.sourceforge.net/tun/. OpenSSL libraries have to be installed on your system. I have never encountered any modern Linux/Unix system that does not meet this requirement. However, if you want to compile OpenVPN from source code, the SSL development package may be necessary. The web site is https://www.openssl.org:443/. The Lempel-Ziv-Oberhumer (LZO) Compression library has to be installed. Again, most modern Linux/Unix systems provide these packages, so there shouldn't be any problem. LZO is a real-time compression library that is used by OpenVPN to compress data before sending. Packages can be found on https://openvpn.net/community/ and the web site of this project is http://www.oberhumer.com/opensource/lzo/. The link for this article located at PactPub is no longer available. . All Linux/Unix systems must meet the following requirements to install OpenVPN successfully: Your sy. installing, openvpn, platform, independent, modern, linux, systems. . LinuxSecurity.com Team

Calendar 2 Dec 05, 2009 User Avatar LinuxSecurity.com Team Privacy
81

Gzip Techniques in Text Analysis and Spam Filtering Methods

I was reading through a bioinformatics book the other day, and was reminded of a useful shortcut for comparing a text against various corpora. A number of researchers have simply fed DNA sequence data into the popular Ziv-Lempel compression algorithm, to . . . . I was reading through a bioinformatics book the other day, and was reminded of a useful shortcut for comparing a text against various corpora. A number of researchers have simply fed DNA sequence data into the popular Ziv-Lempel compression algorithm, to see how much redundancy it contains. Loosely speaking, the LZ (Zip) and the related gzip compression algorithms look for repeated strings within a text, and replace each repeat with a reference to the first occurrence. The compression ratio achieved therefore measures how many repeated fragments, words or phrases occur in the text. A related technique allows us to measure how much a given, "test" text has in common with a corpus of possibly similar documents. If we concatenate the corpus and the test text, and gzip them together, the test text will get a better compression ratio if it has more fragments, words, or phrases in common with the corpus, and a worse ratio if it is dissimilar. Since the LZ algorithm scans the entire input for repetitions, it tends to map pieces of the test text to previous occurrences in the corpus, thereby achieving a high "appended compression ratio" if the test text is similar to what it's appended to. . I was reading through a bioinformatics book the other day, and was reminded of a useful shortcut for. reading, through, bioinformatics, other, reminded, useful, shortcut. . LinuxSecurity.com Team

Calendar 2 Jan 27, 2003 User Avatar LinuxSecurity.com Team Privacy
78

Linux Zlib Security Advisory: Threat to Multiple OS Applications

A warning about the security flaw identified Monday in the zlib compression/decompression library affecting Linux systems (see story) has been broadened to include Windows and any other other operating systems that use the zlib code. In an update about the flaw on their Web site, the authors of the zlib library said they have learned that the code is used in far more programs than they originally believed.. . .. A warning about the security flaw identified Monday in the zlib compression/decompression library affecting Linux systems (see story) has been broadened to include Windows and any other other operating systems that use the zlib code. In an update about the flaw on their Web site, the authors of the zlib library said they have learned that the code is used in far more programs than they originally believed. "The use of zlib has apparently reached pandemic proportions," according to the statement from co-authors Mark Adler and Jean-loup Gailly. "Before the research in February and March of 2002 on this vulnerability, even the authors of zlib had no clue how widespread the use of zlib has become." The link for this article located at ComputerWorld is no longer available. . A warning about the security flaw identified Monday in the zlib compression/decompression library af. warning, about, security, identified, monday, compression/decompression, library. . LinuxSecurity.com Team

Calendar 2 Mar 15, 2002 User Avatar LinuxSecurity.com Team Vendors/Products
78

Zlib Flaw Poses Threat to Microsoft Apps Leveraging Linux Code

A security flaw in open-source software used by Linux and Unix systems for compression may affect some Microsoft products that also use the code. As reported earlier this week by CNET News.com, a flaw in the zlib software-compression library could . . . . A security flaw in open-source software used by Linux and Unix systems for compression may affect some Microsoft products that also use the code. As reported earlier this week by CNET News.com, a flaw in the zlib software-compression library could leave much of the systems based on the open-source operating system Linux open to attack. On Thursday, researchers reported that at least nine of Microsoft's major applications--including Microsoft Office, Internet Explorer, DirectX, Messenger and Front Page--appear to incorporate borrowed code from the compression library and could be vulnerable to a similar attack. Microsoft representatives said that the software giant's security response team is investigating the zlib flaw and that some Microsoft applications use code from that compression library. However, the team hasn't yet determined which applications use the library and whether those applications are vulnerable. The link for this article located at ZDNet is no longer available. . A significant vulnerability within zlib may jeopardize Microsoft applications that rely on Linux-oriented open-source compression libraries.. Zlib Flaw, Open Source Software, Microsoft Security Risk. . LinuxSecurity.com Team

Calendar 2 Mar 15, 2002 User Avatar LinuxSecurity.com Team Vendors/Products
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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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