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Access Control
Security Engineering: A Guide to Building Dependable Distributed Systems CHAPTER 4 Access Control Going all the way back to early time-sharing systems, we systems people regarded the users, and any code they wrote, as the mortal enemies of us and each other. We were like the police force in a violent slum. —ROGER NEEDHAM Microsoft could have incorporated effective security measures as standard, but good sense prevailed. Security systems have a nasty habit of backfiring, and there is no doubt they would cause enormous problems. —RICK MAYBURY 4.1 Introduction Access control is the traditional center of gravity of computer security. It is where se- curity engineering meets computer science. Its function is to control which principals (persons, processes, machines, . .) have access to which resources in the sys- tem—which files they can read, which programs they can execute, how they share data with other principals, and so on. NOTE This chapter necessarily assumes more computer science background than previous chapters, but I try to keep it to a minimum. 51 Chapter 4: Access Controls Figure 4.1 Access controls at different levels in a system. Access control works at a number of levels, as shown in Figure 4.1, and described in the following: 1. The access control mechanisms, which the user sees at the application level, may express a very rich and complex security policy. A modern online busi- ness could assign staff to one of dozens of different roles, each of which could initiate some subset of several hundred possible transactions in the system. Some of these (such as credit card transactions with customers) might require online authorization from a third party while others (such as refunds) might require dual control. -
Microsoft Skype for Business Deployment Guide
Microsoft Skype for Business Deployment Guide Multimedia Connector for Skype for Business 8.5.0 3/8/2020 Table of Contents Multimedia Connector for Skype for Business Deployment Guide 4 Architecture 6 Paired Front End Pools 9 Federation Platform with Microsoft Office 365 Cloud 12 Managing T-Server and UCMA Connectors 14 Prerequisites 16 Provisioning for UCMA Connectors 22 Using Telephony Objects 24 Managing UCMA Connectors 28 Managing T-Server 33 Upgrading Multimedia Connector for Skype For Business 36 Configuring Skype for Business Application Endpoints 37 Configuring Skype for Business User Endpoints 38 High-Availability Deployment 39 Performance 45 Managing Workspace Plugin for Skype for Business 46 Using Workspace Plugin for Skype for Business 51 Handling IM Transcripts 60 Supported Features 61 Alternate Routing 62 Call Monitoring 63 Call Supervision 64 Calling using Back-to-Back User Agent 70 Conference Resource Pools 77 Disable Lobby Bypass 80 Emulated Agents 82 Emulated Ringing 85 Handling Direct Calls 86 Handling Pass-Through Calls 89 Hiding Sensitive Data 91 IM Treatments 93 IM Suppression 94 Music On Hold 97 No-Answer Supervision 98 Presence 99 Remote Recording 103 Remote Treatments 110 Transport Layer Security 112 UTF-8 Encoding 114 Supported Media Types 116 T-Library Functionality 120 Attribute Extensions 124 Hardware Sizing Guidelines and Capacity Planning 130 Error Messages 132 Known Limitations and Workarounds 134 Multimedia Connector for Skype for Business Deployment Guide Multimedia Connector for Skype for Business Deployment Guide Welcome to the Multimedia Connector for Skype for Business Deployment Guide. This Deployment Guide provides deployment procedures and detailed reference information about the Multimedia Connector for Skype for Business as a product, and its components: T-Server, UCMA Connector, and Workspace Plugin. -
Sourcefire White Paper
And Its Role in the Security Model www.sourcefire.com June 2002 Sourcefire, Inc. 7095 Samuel Morse Drive Suite 100 Columbia, MD 21046 410.290.1616 | 410.290.0024 TABLE OF CONTENTS Table of Contents ............................................................................................................2 Open Source Software: OSS...........................................................................................3 What is OSS?..........................................................................................................................3 History.....................................................................................................................................4 Opinions on OSS.....................................................................................................................4 Arguments in favor of OSS ......................................................................................................5 Security, Stability, and Cost .......................................................................................................................5 Standards, Immediacy, and Lack of Restrictions......................................................................................7 Arguments Against OSS..........................................................................................................7 Status Quo and Security.............................................................................................................................8 Poor Packaging and Support .....................................................................................................................9 -
Chapter 3. Booting Operating Systems
Chapter 3. Booting Operating Systems Abstract: Chapter 3 provides a complete coverage on operating systems booting. It explains the booting principle and the booting sequence of various kinds of bootable devices. These include booting from floppy disk, hard disk, CDROM and USB drives. Instead of writing a customized booter to boot up only MTX, it shows how to develop booter programs to boot up real operating systems, such as Linux, from a variety of bootable devices. In particular, it shows how to boot up generic Linux bzImage kernels with initial ramdisk support. It is shown that the hard disk and CDROM booters developed in this book are comparable to GRUB and isolinux in performance. In addition, it demonstrates the booter programs by sample systems. 3.1. Booting Booting, which is short for bootstrap, refers to the process of loading an operating system image into computer memory and starting up the operating system. As such, it is the first step to run an operating system. Despite its importance and widespread interests among computer users, the subject of booting is rarely discussed in operating system books. Information on booting are usually scattered and, in most cases, incomplete. A systematic treatment of the booting process has been lacking. The purpose of this chapter is to try to fill this void. In this chapter, we shall discuss the booting principle and show how to write booter programs to boot up real operating systems. As one might expect, the booting process is highly machine dependent. To be more specific, we shall only consider the booting process of Intel x86 based PCs. -
Deploying Microsoft Windows Server Update Services
Deploying Microsoft Windows Server Update Services Microsoft Corporation Published: June 3, 2005 Author: Tim Elhajj Editor: Sean Bentley Abstract This paper describes how to deploy Microsoft® Windows Server™ Update Services (WSUS). You will find a comprehensive description of how WSUS functions, as well as descriptions of WSUS scalability and bandwidth management features. This paper also offers step-by-step procedures for installation and configuration of the WSUS server. You will read how to update and configure Automatic Updates on client workstations and servers that will be updated by WSUS. Also included are steps for migrating from Microsoft Software Update Services (SUS) to WSUS, as well as steps for setting up a WSUS server on an isolated segment of your network and manually importing updates. The information contained in this document represents the current view of Microsoft Corporation on the issues discussed as of the date of publication. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information presented after the date of publication. This White Paper is for informational purposes only. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS DOCUMENT. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Microsoft Corporation. -
Microsoft DNS
1 a. Domain Name Service (DNS) encompassing Microsoft DNS From Wikipedia, the free encyclopedia Jump to: navigation, search Microsoft DNS is the name given to the implementation of domain name system services provided in Microsoft Windows operating systems. Contents [hide] 1 Overview 2 DNS lookup client o 2.1 The effects of running the DNS Client service o 2.2 Differences from other systems 3 Dynamic DNS Update client 4 DNS server o 4.1 Common issues 5 See also 6 References 7 External links [edit] Overview The Domain Name System support in Microsoft Windows NT, and thus its derivatives Windows 2000, Windows XP, and Windows Server 2003, comprises two clients and a server. Every Microsoft Windows machine has a DNS lookup client, to perform ordinary DNS lookups. Some machines have a Dynamic DNS client, to perform Dynamic DNS Update transactions, registering the machines' names and IP addresses. Some machines run a DNS server, to publish DNS data, to service DNS lookup requests from DNS lookup clients, and to service DNS update requests from DNS update clients. The server software is only supplied with the server versions of Windows. [edit] DNS lookup client Applications perform DNS lookups with the aid of a DLL. They call library functions in the DLL, which in turn handle all communications with DNS servers (over UDP or TCP) and return the final results of the lookup back to the applications. 2 Microsoft's DNS client also has optional support for local caching, in the form of a DNS Client service (also known as DNSCACHE). Before they attempt to directly communicate with DNS servers, the library routines first attempt to make a local IPC connection to the DNS Client service on the machine. -
Microsoft Office
Microsoft Office MICROSOFT OFFICE INTRODUCTION Microsoft Office is an office suite of desktop applications, servers and services for the Microsoft Windows and OS X operating systems. It was first announced by Bill Gates of Microsoft on August 1, 1988 at COMDEX in Las Vegas. Initially a marketing term for a bundled set of applications, the first version of Office contained Microsoft Word, Microsoft Excel and Microsoft PowerPoint. Over the years, Office applications have grown substantially closer with shared features such as a common spell checker, OLEdata integration and Visual Basic for Applications scripting language. Microsoft also positions Office as a development platform for line-of-business software under the Office Business Applications brand. On 10 July 2012, Softpedia reported that Office is used by over a billion people worldwide. The current versions are Office 2013 for Windows, released on October 11, 2012; and Office 2011 for OS X, released October 26, 2010 On 24 October 2012, the RTM final code of Office 2013 Professional Plus was released to TechNet and MSDN subscribers for download. On 15 November 2012, the 60-day trial version of Office 2013 Professional Plus was released for download. All devices running Windows Phone and Windows RT come pre-installed with Office Mobile and Office RT, respectively. Office Mobile is also available for Android phones and the iPhone. A version of Office for the iPad was launched in March 2014. A web-based version of Office called Office Online, is also available COMPONENTS Word Microsoft Word is a word processor and was previously considered the main program in Office. -
Linux Boot Loaders Compared
Linux Boot Loaders Compared L.C. Benschop May 29, 2003 Copyright c 2002, 2003, L.C. Benschop, Eindhoven, The Netherlands. Per- mission is granted to make verbatim copies of this document. This is version 1.1 which has some minor corrections. Contents 1 introduction 2 2 How Boot Loaders Work 3 2.1 What BIOS does for us . 3 2.2 Parts of a boot loader . 6 2.2.1 boot sector program . 6 2.2.2 second stage of boot loader . 7 2.2.3 Boot loader installer . 8 2.3 Loading the operating system . 8 2.3.1 Loading the Linux kernel . 8 2.3.2 Chain loading . 10 2.4 Configuring the boot loader . 10 3 Example Installations 11 3.1 Example root file system and kernel . 11 3.2 Linux Boot Sector . 11 3.3 LILO . 14 3.4 GNU GRUB . 15 3.5 SYSLINUX . 18 3.6 LOADLIN . 19 3.7 Where Can Boot Loaders Live . 21 1 4 RAM Disks 22 4.1 Living without a RAM disk . 22 4.2 RAM disk devices . 23 4.3 Loading a RAM disk at boot time . 24 4.4 The initial RAM disk . 24 5 Making Diskette Images without Diskettes 25 6 Hard Disk Installation 26 7 CD-ROM Installation 29 8 Conclusions 31 1 introduction If you use Linux on a production system, you will only see it a few times a year. If you are a hobbyist who compiles many kernels or who uses many operating systems, you may see it several times per day. -
Licensing Windows and Microsoft Office for Use on the Macintosh
Volume Licensing brief Licensing Windows and Microsoft Office for use on the Macintosh This brief applies to all Volume Licensing programs. Contents Summary .............................................................................................................................................................................. 1 What’s new in this brief .................................................................................................................................................... 1 Details .................................................................................................................................................................................... 1 Licensing of the Windows operating system for the Mac ................................................................................ 1 Scenarios ....................................................................................................................................................................... 2 Licensing of Microsoft Office for Windows and Microsoft Office for Mac .................................................. 6 Frequently asked questions ............................................................................................................................................ 7 Summary This licensing brief addresses the commonly asked questions about licensing the Windows operating system and Microsoft Office to run on the Macintosh. What’s new in this brief This replaces a previous version published in August 2015. It has -
How Do I Download Microsoft Games on My Pc How to Reinstall a Purchased Game from Microsoft Store That Is Not Showing up in Library
how do i download microsoft games on my pc how to reinstall a purchased game from microsoft store that is not showing up in Library. Thanks for your feedback, it helps us improve the site. How satisfied are you with this reply? Thanks for your feedback. First, try signing out of the Microsoft Store. Click your Profile picture at the top right, click your account then sign out. Restart your computer, launch the Microsoft Store app, sign in again, then attempt downloading again. Click the ellipsis in the top right corner of the screen (. ) Click My Library Scroll through the list then click the Cuphead app if its listed there, then click the download button. If doesn't help, let us know and we can explore more options. Other things you can try. Start by running the Windows Store Apps troubleshooter. Open Start > Settings > Update & security > Troubleshoot Scroll down to the bottom Click Windows Store Apps. Click Run the troubleshooter. When complete try opening the Store again. Also check if the Store works in another user account. Press Windows key + R Type: wsreset.exe Hit Enter. Do this a couple times then try launching the Store again. Your Antivirus might be interfering with the Store, try disabling it 'temporarily' to see if it launches. Check Windows Update and install the latest updates. Sometimes Microsoft releases infrastructure fixes for the Store through Windows Update. You can also try resetting the store app using the following instructions: Reinstall the Store: Press Windows key + X Click Windows PowerShell (Admin) At the command prompt, type the following then hit Enter: Get-AppXPackage *WindowsStore* -AllUsers | Foreach. -
Caveat Venditor: Technologically Protected Subsidized Goods and the Customers Who Hack Them Christopher Soghoian
Northwestern Journal of Technology and Intellectual Property Volume 6 Article 3 Issue 1 Fall Fall 2007 Caveat Venditor: Technologically Protected Subsidized Goods and the Customers Who Hack Them Christopher Soghoian Recommended Citation Christopher Soghoian, Caveat Venditor: Technologically Protected Subsidized Goods and the Customers Who Hack Them, 6 Nw. J. Tech. & Intell. Prop. 46 (2007). https://scholarlycommons.law.northwestern.edu/njtip/vol6/iss1/3 This Article is brought to you for free and open access by Northwestern Pritzker School of Law Scholarly Commons. It has been accepted for inclusion in Northwestern Journal of Technology and Intellectual Property by an authorized editor of Northwestern Pritzker School of Law Scholarly Commons. NORTHWESTERN JOURNAL OF TECHNOLOGY AND INTELLECTUAL PROPERTY Caveat Venditor: Technologically Protected Subsidized Goods and the Customers Who Hack Them Christopher Soghoian Fall 2007 VOL. 6, NO. 1 © 2007 by Northwestern University School of Law Northwestern Journal of Technology and Intellectual Property Copyright 2007 by Northwestern University School of Law Volume 6, Number 1 (Fall 2007) Northwestern Journal of Technology and Intellectual Property Caveat Venditor: Technologically Protected Subsidized Goods and the Customers Who Hack Them By Christopher Soghoian* I. INTRODUCTION ¶1 This paper focuses on the subsidization of a technology-based durable good.1 It goes on to discuss the delicate dance between the producer trying to protect its profit, competitors trying to create and sell aftermarket goods,2 and those innovative customers who use the items in completely unplanned and unprofitable ways. ¶2 An age old, but increasingly popular business model involves the subsidization of a proprietary durable good by a manufacturer, such that the good is sold below cost.3 Due to careful design, technological, and legal restrictions, the producer creates a primary product that is only compatible with its own aftermarket goods. -
Umail Account Migration to Exchange Online Starts on June 1
UMail account migration to Exchange Online starts on June 1 You're receiving this email because you're subscribed to UIT's public email list. Starting Tuesday, June 1, 2021, University Information Technology (UIT) will begin to gradually migrate all University of Utah and University of Utah Health faculty and staff UMail accounts from Microsoft Exchange Server (hosted on campus) to Microsoft Exchange Online (hosted online by Microsoft infrastructure). The upgrade is part of the effort to modernize the U’s communication technology and better meet the needs of those working, learning, and teaching remotely. Faculty and staff will receive a targeted email 24 to 48 hours prior to initiation of their account migration. The total time for your migration depends on the size of the mailbox(es) to be moved and amount of data to be transferred to Microsoft servers. Extremely large mailboxes can take a number of days to transfer. If you’re unable to access your UMail account through your desktop/mobile client or web browser after the migration, please refer to this IT Knowledge Base article for instructions. Please note that UMail is always accessible via Outlook Web Access (OWA) using a web browser. After your account is moved to Exchange Online, you may receive a notification that says “The Microsoft Exchange Administrator has made a change that requires you to quit and restart Outlook.” Please follow the directions. The migration includes an updated interface for OWA, which will redirect from https://www.umail.utah.edu/ to https://outlook.office.com/. The interfaces of the Outlook desktop and mobile clients will remain the same for most users, although some macOS users may automatically update to the latest version of Outlook for Mac.