Middlesex

LDAP

2010-08-21T20:22:00.000-07:00

The Lightweight Directory Access Protocol (LDAP) is an application protocol for querying and modifying data of directory services implemented in Internet Protocol (IP) networks.

A directory is a set of objects with attributes organized logically in a hierarchical manner. A simple example is the telephone directory, which consists of a list of names (of either persons or organizations) organized alphabetically, with each name having an address and phone number associated with it.

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A directory information tree often reflects various political, geographic, and/or organizational boundaries, depending on the model chosen. LDAP deployments today tend to use Domain Name System (DNS) names for structuring the topmost levels of the hierarchy. Deeper inside the directory might appear entries representing people, organizational units, printers, documents, groups of people or anything else that represents a given tree entry (or multiple entries).

The latest version of LDAP is Version 3, which is specified in a series of Internet Engineering Task Force (IETF) Standard Track Requests for comments (RFCs) as detailed in RFC 4510

Protocol overview

A client starts an LDAP session by connecting to an LDAP server, called a Directory System Agent (DSA), by default onTCP port 389. The client then sends an operation request to the server, and the server sends responses in return. With some exceptions, the client does not need to wait for a response before sending the next request, and the server may send the responses in any order.

The client may request the following operations:

§ Start TLS — use the LDAPv3 Transport Layer Security (TLS) extension for a secure connection

§ Bind — authenticate and specify LDAP protocol version

§ Search — search for and/or retrieve directory entries

§ Compare — test if a named entry contains a given attribute value

§ Add a new entry

§ Delete an entry

§ Modify an entry

§ Modify Distinguished Name (DN) — move or rename an entry

§ Abandon — abort a previous request

§ Extended Operation — generic operation used to define other operations

§ Unbind — close the connection (not the inverse of Bind)

In addition the server may send "Unsolicited Notifications" that are not responses to any request, e.g. before it times out a connection.

A common alternate method of securing LDAP communication is using an SSL tunnel. This is denoted in LDAP URLs by using the URL scheme "ldaps". The default port for LDAP over SSL is 636. The use of LDAP over SSL was common in LDAP Version 2 (LDAPv2) but it was never standardized in any formal specification. This usage has been deprecated along with LDAPv2, which was officially retired in 2003.

LDAP is defined in terms of ASN.1, and protocol messages are encoded in the binary format BER. It uses textual representations for a number of ASN.1 fields/types, however.

Directory structure

dn: cn=John Doe,dc=example,dc=com

cn: John Doe

givenName: John

sn: Doe

telephoneNumber: +1 888 555 6789

telephoneNumber: +1 888 555 1232

mail: john@example.com

manager: cn=Barbara Doe,dc=example,dc=com

objectClass: inetOrgPerson

objectClass: organizationalPerson

objectClass: person

objectClass: top

IP Addressing A Simplified Tutorial

2010-08-14T05:53:00.001-07:00

Classless Inter-Domain Routing (CIDR) is a methodology of allocating IP addresses and routing Internet Protocol packets. It was introduced in 1993 to replace the prior addressing architecture of classful network design in the Internet with the goal to slow the growth of routing tables on routers across the Internet, and to help slow the rapid exhaustion of IPv4 addresses.

IP addresses are described as consisting of two groups of bits in the address: the most significant part is the network address which identifies a whole network or subnet and the least significant portion is the host identifier, which specifies a particular host interface on that network. This division is used as the basis of traffic routing between IP networks and for address allocation policies. Classful network design for IPv4 sized the network address as one or more 8-bit groups, resulting in the blocks of Class A, B, or C addresses. Classless Inter-Domain Routing allocates address space to Internet service providers and end users on any address bit boundary, instead of on 8-bit segments. In IPv6, however, the host identifier has a fixed size of 64 bits by convention, and smaller subnets are never allocated to end users.

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Introducing Microsoft SQL Server 2008 R2

2010-04-28T21:00:00.001-07:00

Introducing Microsoft SQL Server 2008 R2

SQL Server 2008 R2 was announced at TechEd 2009, and was released to manufacturing on April 21, 2010 . SQL Server 2008 R2 adds certain features to SQL Server 2008 including master data management system branded asMaster Data Services, a centralized console to manage multiple SQL Server instances, and support for more than 64 logical processors.

PART I Database Administration

CHAPTER 1 SQL Server 2008 R2 Editions and Enhancements

CHAPTER 2 Multi-Server Administration

CHAPTER 3 Data-Tier Applications

CHAPTER 4 High Availability and Virtualization Enhancements

CHAPTER 5 Consolidation and Monitoring

PART II Business Intelligence Development

CHAPTER 6 Scalable Data Warehousing

CHAPTER 7 Master Data Services

CHAPTER 8 Complex Event Processing with StreamInsight

CHAPTER 9 Reporting Services Enhancements

CHAPTER 10 Self-Service Analysis with PowerPivot

Proxy Server ?

2010-04-14T20:21:00.000-07:00

Proxy Server ?

A proxy server is a computer that sits between a client and a server to intercept requests. There are several uses of a proxy server, but the most common is to speed network traffic by caching pages or files that are requested often. By doing so, the proxy server can deliver the request quickly, only polling the server when required. In this way, a proxy server not only speeds up network traffic, but also relieves server load. Major Internet hubs and Internet Service Providers (ISPs) employ dozens of proxy servers.

Filtering or censorship is another use for a proxy server. A company that provides Internet connectivity to its employees might configure a proxy server to block requests for certain websites. It can also filter content based on configurable criteria to help enforce acceptable use policies.

If a proxy server does not require a Web browser to be configured to use the proxy, it’s called a transparent proxy server. Otherwise, the Web browser must point to the proxy in order to use it. Companies favor the former, as employees cannot bypass it by reconfiguring their Web browsers. A proxy server is also commonly used as a firewall. It can scan for malware, viruses, and other threats, safeguarding the main server and network.

Secure Sockets Layer (SSL) servers used to create Virtual Private Networks (VPNs) sometimes use https proxies. These proxies speed traffic over secure channels and check for viruses in tunneled communications. The https proxy server can encrypt, decrypt, and cache encrypted data. Regular proxy servers cannot cache encrypted data for security reasons, and therefore serve no purpose in a VPN. There are differences of opinion as to whether https proxy servers create potential security risks.

Yet another use for a proxy server is to provide anonymous Web surfing. Many services provide proxies for the public to use to protect their online anonymity. The customer’s requests go to the website’s proxy server, which strips the customer’s Internet protocol (IP) address and sends them on their way. The information gets routed back to the proxy, which then forwards the pages to the customer’s browser. As far as the Internet is concerned, the only IP address on the remote server(s) is the proxy’s IP address. Only the proxy server knows the customer’s IP address. Companies that run anonymous proxy servers generally claim to wipe proxy server logs often to protect customer privacy.

Another model includes a network of volunteer proxy servers. This model uses encryption to obfuscate the original IP address and ultimate route a request takes. As the request makes its way through the Internet from one proxy server to the next, each server in the middle can only read the adjacent steps in the chain. Contents, origin, and ultimate destination are all unavailable.

The final proxy server decrypts the contents and delivers the request to the server without a plain text record of where the request originated. The page or file then returns the same way, through a series of encrypted steps. This system thwarts traffic analysis and protects privacy while protecting the proxy servers themselves.

PHP

2010-02-19T20:28:00.000-08:00

PHP: Hypertext Preprocessor

PHP: Hypertext Preprocessor (the name being a recursive acronym) is a widely used, general-purpose scripting language that was originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document. As a general-purpose programming language, PHP code is processed by an interpreter application in command-line mode performing desired operating system operations and producing program output on its standard output channel. It may also function as a graphical application. PHP is available as a processor for most modern web servers and as standalone interpreter on most operating systems and computing platforms.

PHP was originally created by Rasmus Lerdorf in 1995[1] and has been in continuous development ever since. The main implementation of PHP is now produced by The PHP Group and serves as the de facto standard for PHP as there is no formal specification. PHP is free software released under the PHP License, which is incompatible with the GNU General Public License (GPL) because restrictions exist regarding the use of the term PHP.

Collection of MCSE and MCSA

2010-02-03T01:27:00.000-08:00

Collection of MCSE and MCSA

Summary:

This is a collection of MCSE (Microsoft Certified System Engineer) and MCSA (Microsoft Certified System Administrator) e-books. In this collection you can find e-books related:
70-210 / 70-214
70-215 / 70-216
70-290 / 70-291
70-292 / 70-293
70-294 / 70-296

70-297 / 70-298
70-299
and a bunch of e-books of mixed ones in the directory of
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Microsoft Certified Systems Administrator (MCSA)

The Microsoft Certified Systems Administrator (MCSA) certification certifies a user's knowledge in system administration of Microsoft Windows operating systems and is generally simpler than, but not a subset of, the MCSE. The Windows Server 2003 MCSA is achieved upon passing 2 networking system exams, a client operating system exam, and an elective exam. The Windows Server 2000 MCSA title is granted after taking 3 core exams and one elective. Meeting the current requirements for the MCSE designation will almost certainly meet the requirements for MCSA.

Whereas the MCSE is supposed to certify a person's ability to "plan, design, and implement Microsoft Windows server solutions and architectures in medium- to large-sized companies", the MCSA certifies a holder's ability to "implement, manage, and maintain the typically complex computing environment of medium- to large-sized companies".

Like the MCSE, the MCSA is available as "MCSA on Windows 2000" and "MCSA on Windows 2003" as of 2005. There exist two specializations for both tracks: Messaging and Security.

Microsoft Certified Systems Engineer (MCSE)

MCSE stands for Microsoft Certified Systems Engineer. It is the most widely known Microsoft certification and it is available for Windows 2000 and Windows server 2003. Each has a different set of examinations. MCSE qualified persons have the ability to provide business solutions by designing and implementing the required infrastructure. MCSE certification is useful for Technical support & Systems engineers, Technical consultants, Network and Systems analysts and also for regular software engineers.

MCSE 2000 has four operating exams, two electives and one design exam that is a total of seven exams. The topics include configuring, installing and administrating Windows 2000 professional, Windows 2000 server and implementing and administering, Windows 2000 Network infrastructure and Windows 2000 directory service infrastructure.

Windows Server 2008

2010-01-17T20:51:00.000-08:00

Windows Server 2008

Windows Server 2008 is one of Microsoft Windows' server line of operating systems. Released to manufacturing on February 4, 2008, and officially released on February 27, 2008, it is the successor to Windows Server 2003, released nearly five years earlier. A second release, named Windows Server 2008 R2, was released to manufacturing on July 22, 2009.^[3] Like Windows Vista and Windows 7, Windows Server 2008 is built on Windows NT 6.x.

Features

Artificial Intelligence a Modern Approach

2010-01-06T01:54:00.000-08:00

Artificial Intelligence a Modern Approach

Artificial Intelligence: A Modern Approach (ISBN 0-13-790395-2) (AIMA) is a college textbook on Artificial Intelligence, written by Stuart J. Russell and Peter Norvig. The second edition of the book was released on December 20, 2002. It is used in over 1000 universities worldwide.^[1]

The book is intended for an undergraduate audience but can also be used for graduate-level studies with the suggestion of adding some of the primary sources listed in the extensive bibliography.

Chapters

Artificial Intelligence: A Modern Approach is divided into eight parts with a total of 27 chapters. The authors state that it is a large text which would take two semesters to cover all the chapters and projects.

Part I: Artificial Intelligence - Sets the stage for the following sections by viewing AI systems as intelligent agents that can decide what actions to take and when to take them.
Part II: Problem Solving - Focuses on methods for deciding what action to take when needing to think several steps ahead such as playing a game of chess.
Part III: Knowledge and Reasoning - Discusses ways to represent knowledge about the intelligent agents' environment and how to reason logically with that knowledge.
Part IV: Acting Logically - Concentrates on constructing plans using the reasoning methods discussed in the previous section.
Part V: Uncertain Knowledge and Reasoning - This section is analogous to Parts III and IV but deals with reasoning and decision-making in the presence of uncertainty in the environment.
Part VI: Learning - Describes ways for generating knowledge required by the decision-making components and introduces a new component the neural network.
Part VII: Communicating Perceiving - Concentrates on ways an intelligent agent can perceive its environment whether by touch vision.
Part VIII: Conclusions - Considers the past and future of AI by discussing what AI really is and why it has succeeded to some degree. Also the views of those philosophers who believe that AI can never succeed are given discussion.

CISSP Certification All-in-One Exam Guide, 4th edition

2010-01-02T19:21:00.000-08:00

CISSP Certification All-in-One Exam Guide, 4th edition

Language: English

ISBN-10: 0071497870

ISBN-13: 978-0071497879

Fully revised for the latest exam release, this authoritative volume offers thorough coverage of all the material on the Certified Information Systems Security Professional (CISSP) exam. Written by a renowned security expert and CISSP, this guide features complete details on all 10 exam domains developed by the International Information Systems Security Certification Consortium (ISC²). Inside, you?ll find learning objectives at the beginning of each chapter, exam tips, practice questions, and in-depth explanations. CISSP All-in-One Exam Guide, Fourth Edition will not only help you pass the test, but also be your essential on-the-job reference.

Covers all 10 subject areas on the exam:

Access control
Application security
Business continuity and disaster recovery planning
Cryptography
Information security and risk management
Legal, regulations, compliance, and investigations
Operations security
Physical (environmental) security
Security architecture and design
Telecommunications and network security

CCNA - Cisco Certified Network Associate Study Guide

2009-12-14T19:40:00.000-08:00

CCNA - Cisco Certified Network Associate Study Guide

The Cisco Certified Network Associate (CCNA) is the first step to the hottest certification in the internetworking industry. This CCNA study guide maps to Cisco's CCNA training path and provides full coverage of crucial exam topics, including review sections and hundreds of practice questions. The CD contains test-preparation software and informational resources.

ebooks

2009-12-14T19:24:00.000-08:00

What is an eBook?

An eBook is a series of Adobe Acrobat PDF files, available only on the Progress eLearning Catalog. The content of these files is identical to the hardcopy books that you would receive in class. It is a complete, self-paced training package, that includes:

• Lesson PDF files
• Lab PDF files
• A self-extracting executable that contains exercise files.

Like web-based training, Progress Software’s eBooks are hands-on. Your subscription allows you to view online the course’s comprehensive Student Guide and Lab Guide. These online Guides are identical to the hardcopy books that you would receive in class. The Lab Guide includes a complete set of exercises and lab assignments. You can also download the course exercise files which allow you to run demonstrations and complete the course’s labs on your own machine.