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Cryptanalysis of Microsoft’s Point-to-Point Tunneling Protocol (PPTP)The Point-to-Point Tunneling Protocol (PPTP) is used to secure PPP connections over TCP/IP links. In this paper we analyze Microsoft’s Windows NT implementation of PPTP. We show how to break both the challenge/response authentication protocol (Microsoft CHAP) and the RC4 encryption protocol (MPPE), as well as how to attack the control channel in Microsoft’s implementation. These attacks do not necessarily break PPTP, but only Microsoft’s implementation of the protocol.
Many organizations and institutions are not centralized. Branch offices, virtual corporations, and traveling employees make the notion of running dedicated network connections to each location logistically impossible. The concept of virtual networking provides a solution to this problem by tunneling cojoined network space over other, transitory and insecure, networks (such as the Internet), thus enabling remote locations to appear to be local. This is done without the expense incurred from running leased lines or dedicated cabling to each location, and is sometimes called a “tunnel.”
While virtual networks solve the problem of de- centralized machines, they create a new problem. They open up traffic that was previously considered internal to the company, to any prying eyes on the networks it traverses. Authentication and encryption are required to keep this virtual network traffic not only tamperproof but private. The result, virtual networking connections combined with cryptographic protections, is a Virtual Private Network (VPN).
The security of a VPN is based on the security of its authentication and encryption protocols. If a VPN’s cryptography is weak, then its security is no better than a non-private virtualImproving web server performance by a clustering-based dynamicstatic load balancing is achieved. Each back-end web server is made up of twocomponents: the Queue Agent (QA) and the Coordinator Agent
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Jeopardy in Web 2.0What on earth is Web 2.0? Web 2.0 carries a high profile and surrounding hype. Developers must surely be feeling the heat to quickly adopt the new second generation of dynamic, interactive and simple by design technologies.
Web 2.0 is the term pioneered by O’Reilly for new generation Web applications.Live.com, start.com, Google maps, Google Docs, YouTube, Flickr, and MySpace are few examples. Adaptation of this technology vector has changed the web application development approach and methodology significantly.AJAX (Asynchronous JavaScript), RIA(Rich Internet Applications) and Web Services form the core components of Web 2.0applications.
AJAX delivers a rich user interface by displaying more dynamic content. Another common technique is Real Simple Syndications feeds (RSS), an XML based standard that allows subscribers to promote information feeds. This is most commonly used to subscribe to blogs and news articles. AJAX and Rich Internet Application (RIA) clients are enhancing client-end interfaces in the browser itself. XML is making a significant impact at both presentation and transport (HTTP/HTTPS) layers. To some extent XML is replacing HTML at the presentation layer while SOAP is becoming the XML-based transport mechanism of choice.
With Web 2.0, the functionality and experience of the sites become the primary focus, and the technology empowering the dynamic content is hidden behind the scenes to the average user. Yet the web applications underneath the polished finish remain just as complex, and add a variety of new and often unproven or unsecured technologies to the back end. Worms like Spaceflash, Yamanner and Samy are exploiting “client-side” AJAX frameworks,Create Ajax-style architectures with the IBM Web 2.0 Feature PackThis article shows you how a Java™ 2 Platform, Enterprise Edition (J2EE) application was enhanced with an Ajax-style architecture by using the IBM® WebSphere® Application Server Feature Pack for Web 2.0. Learn how to combine Ajax-style architectures with an existing application without having to rewrite the entire Web application. You'll also discover some ideas on how to apply the Web 2.0 Feature Pack to your own J2EE applications for IBM WebSphere Application Server. The "Plants by WebSphere" application is among a number of samples that are provided with the IBM WebSphere Application Server Feature Pack for Web 2.0.
The application exemplifies a typical J2EE application and how it can be enhanced with an Ajax-style architecture without rewriting the entire application. The sample application represents a fictitious online plant store where customers can order and purchase flowers, trees, vegetables, and accessories. Take a look at Figure 1, which shows the front page of the Web application
Figure 2 illustrates the architecture of the application in its original form before attempting to add Ajax-style features. The architecture is intended to be fairly typical for a J2EE application running on WebSphere Application Server. At a high level, the application adheres to a Model-View-Controller (MVC) design pattern, which most Web applications follow on some level. A browser accesses the URL for the application, which returns a JSP-rendered HTML page. The browser issues additional requests to the Web application, and servlets are used to control the flow as users move through the purchase request. Enterprise JavaBeans (EJBs)Programmer's Guide to the Java 2D - API Enhanced Graphics and Imaging for JavaThe Java 2D™ API enhances the graphics, text, and imaging capabilities of the Abstract Windowing Toolkit (AWT), enabling the development of richer user interfaces and new types of Java™ applications. Along with these richer graphics, font, and image APIs, the Java 2D API supports enhanced color definition and composition, hit detection on arbitrary geometric shapes and text, and a uniform rendering model for printers and display devices. The Java 2D API also enables the creation of advanced graphics libraries, such as CAD-CAM libraries and graphics or imaging special effects libraries, as well as the creation of image and graphic file read/write filters.
When used in conjunction with the Java Media Framework and other Java Media APIs, the Java 2D APIs can be used to create and display animations and other multimedia presentations. The Java Animation and Java Media Framework APIs rely on the Java 2D API for rendering support.
Enhanced Graphics, Text, and Imaging
Early versions of the AWT provided a simple rendering package suitable for rendering common HTML pages, but not full-featured enough for complex graphics, text, or imaging. As a simplified rendering package, the early AWT embodied specific cases of more general rendering concepts. The Java 2D™ API provides a more flexible, full-featured rendering package by expanding the AWT to support more general graphics and rendering operations.
For example, through the Graphics class you can draw rectangles, ovals, and polygons. Graphics2D enhances the concept of geometric rendering by providing a mechanism for rendering virtually any geometric shape. Similarly, with the Java 2DHP Pavilion dv2500 and dv2700 Maintenance and Service ManualExternal component identification Top components Display components Buttons, speakers, and fingerprint reader Keys Lights TouchPad Front components Left-side components Rear component Right-side components Bottom components 3 Illustrated parts catalog Serial number location Computer major components Display assembly components Door/Cover Kit Cable Kit Mass storage devices Miscellaneous parts Sequential part number listing 4 Removal and replacement procedures Preliminary replacement requirements Tools required Service considerations Plastic parts Cables and connectors Drive handling Grounding guidelines Electrostatic discharge damage Packaging and transporting guidelines Workstation guidelines Equipment guidelines Unknown user password
Component replacement procedures Serial number Computer feet Battery Camera module Display inverter Hard drive WLAN module SIM RTC battery Memory module Optical drive Keyboard WWAN module Switch cover Display assembly Top cover TouchPad Wireless switch board Modem module Audio board Bluetooth module USB board Speaker assembly Display switch module System board Power connector cable ExpressCard assembly Fan/heat sink assembly Processor 5 Setup Utility Starting the Setup Utility Changing the language of the Setup Utility Navigating and selecting in the Setup Utility Displaying system information Restoring default settings in the Setup Utility Using advanced Setup Utility features Closing the Setup Utility Setup Utility menus 6 Specifications Computer specifications 14.1-inch, WXGA, BrightView display specifications Hard drive specifications DVD±RW and CD-RW Super Multi Double-Layer Combo Drive specifications High Definition DVD-ROM and DVD±RW Drive System DMA specifications System System System System System System 7 Screw listing Phillips PM2.0×5.0 captive screw Phillips PM2.5×4.0 screw Phillips PM3.0×4.0 screw Phillips PM2.0×6.0 shoulder screw Phillips PM2.5×9.0 screw Silver Phillips PM2.0×3.0 screw Phillips PM2.5×7.0Audi A6 Avant Quick Reference Guide ManualThis PDF Manual Audi A6 Avant Quick Reference Guide includes the Safety Seat belts must be worn on every journey, even on short trips in town. This applies to the front and rear seats. To ensure that the seat belts, belt tensioners and airbags are fully effective, note the following points: Adjust seat and sit in correct position The front seats should not be positioned too close to the steering wheel or dashboard. Main- tain a distance of at least 25 cm from the steering wheel.
It is important to sit in a normal, up-right position and set the back- rest so it is fully against your back. The top of the head restraint should be at eye level (or higher). Put your feet in acomfortable position in the foot- well. Audi A6 Owner’s Manual…
Download Audi A6 Avant Quick Reference Guide ManualWPE-600 AeroCard Wireless PCMCIA Card User ManualAeroCard, the Wireless LAN (WLAN) PCMCIA card for Mac and PC. Welcome to the Macsense/Xsense Networking Product Family. These days, business moves at lightning speed. To compete, companies must make it easy for their employees to share vital business intelligence real-time and to collaborate without restriction. But until now, network users have been bound by the limits of their wired network, and forced to settle for access only at their desk. A trend in the technology industry today is to eliminate the cable restrictions and hassle of wires by implementing a wireless network.
By choosing wireless you reduce the hassle of cable clutter, the expensive need to run cabling in the home or office and the aggravation altogether to crawl under that desk for the last time to see if that Ethernet cable is connected. A WLAN standard called IEEE 802.11b has emerged delivering speeds of up to 11 Mbps and the ability to take the power of the Internet with you. Imagine the ease of which you can setup this wireless network providing roaming access to the Internet and your network. The combined flexibility of a laptop and our Wireless card can provide some impressive changes indeed. Surf the Net while sitting on the couch during the big Sunday game. Review your stock portfolio in bed. Maybe the kids want to chat with friends on AOL out by the pool. The convenience of where and when you want to connect to your network or Internet is now yours. 1.1 BenefitsLinux Guide Step by Step Tutorial pdfHow to install Linux since it is very straight forward but it gives you real world mail, DNS, proxy, web, messaging etc… server installations and configurations. System administration is all the things that one has to do to keep a computer system in a useable shape. It Includes things like backing up files and restoring , installing new programs, creating accounts for users, making certain that the filesystem is not corrupted, and so on. There is no one official Linux distribution, so different people have different setups, and many people have a setup they have built up themselves.
This book is not targeted at any one distribution, even though I use Red Hat Linux 8 and 9 the contents can be applied to any distribution. Many people have helped me with this book, directly or indirectly. I would like to especially thank my own brother Dilan Kalpa De Silva, Luckshika Jayadeva for her excellent type-setting, my ever loving mother, two sisters and my aunt Mallika Vitharana.
Download Linux Guide Step by Step Tutorial pdfCCAD Suite of User Guides - Using Lotus Notes GuideThis manual is intended to show you the basics of Lotus Notes and how to navigate within the Lotus Notes application whilst using CCAD Databases. To get Help while you are exploring Notes, press F1 or choose Help - Help Topics from the menu.
To learn about installing Lotus Notes, connecting to CCAD servers, security and system requirements please see ‘Volume 1 - Installation Guide’.
To learn about using the CCAD Welcome Portal, please see ‘Volume 2 - Welcome Portal Guide’.
To learn about using a specific database, please see any ‘Volume 4’ manual
Lotus Notes Basics
To use Notes, you must have a user id (a small password protected file on your computer), and know your username and password.
The first time you open Notes, you will be presented with the following box; you must enter your password to continue.
To change you password, choose File – Security – User Security. Then click the Change Password button.
If you leave your computer, press F5 to log off/lock your computer. Locking your Notes display lets you protect your data when you are away from your computer, without having to close the databases you are working in. It is a good idea to lock your Notes display whenever you leave data unattended.
Download pdf CCAD Suite of User Guides - Using Lotus Notes Guide
