Security in unix

Lecture "Operating system - Chapter 10: Case study 1 - Unix and Linux" has contents: History of unix, overview of unix, processes in unix, memory management in unix, input/output in unix, the unix file system, security in unix.

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Operating System: Chapter 10 - Case Study 1 - UNIX and LINUX presents about History of unix, Overview of unix, Processes in unix, Memory management in unix, Input/output in unix, The unix file system, Security in unix.

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Lecture Operating System: Chapter 10 - Unix and Linux presented History of unix, Overview of unix, Processes in unix, Memory management in unix, Input/output in unix, The unix file system, Security in unix.

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Overview Access Control Matrix model Discretionary Access Control (DAC) Mandatory Access Control (MAC) and an example model Role Based Access Control (RBAC) Access Control in Unix Sep 2009 Information Security by Van K Nguyen Hanoi University of Technology 2 .What is AC Quote from Ross Anderson (text “Security Engineering”) Its function is to control which principals (persons, processes, machines, …) have access to which resources in the system -- which files they can read, which programs they can execute, and how they share data with other principals, and so on....

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MCSE Core Required Exams in a Nutshell MCSE Core Elective Exams in a Nutshell MCSA on Windows Server 2003 Core Exams in a Nutshell Security Warrior Network Security Assessment Internet Core Protocols: The Definitive Guide TCP/IP Network Administration 802.11 Wireless Networks: The Definitive Guide PC Hardware in a Nutshell Linux in a Nutshell Windows Vista in a Nutshell Unix in a Nutshell’Reilly brings diverse innovators together to nurture the ideas that spark revolutionary industries.

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Note that we are intentionally leaving out certain systems because they are too complicated to be appropriately handled in the time permitted. These services are covered in detail in courses from the SANS Unix Security curriculum: • NTP, Apache, DNS, and Sendmail are all covered in the Running Unix Applications Securely course (day four of the curriculum). • Topics in Unix Security (day three) spends half a day talking about SSH. • RPC-based applications (including NFS and NIS) and vulnerabilities are covered in more detail in the Common Unix Vulnerabilities class (day one)....

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There are hundreds--if not thousands--of techniques used to compromise both Windows and Unix-based systems. Malicious code and new exploit scripts are released on a daily basis, and each evolution becomes more and more sophisticated. Keeping up with the myriad of systems used by hackers in the wild is a formidable task, and scrambling to patch each potential vulnerability or address each new attack one-by-one is a bit like emptying the Atlantic with paper cup.

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What if you could sit down with some of the most talented security engineers in the world and ask any network security question you wanted? Security Power Tools lets you do exactly that! Members of Juniper Networks' Security Engineering team and a few guest experts reveal how to use, tweak, and push the most popular network security applications, utilities, and tools available using Windows, Linux, Mac OS X, and Unix platforms. Designed to be browsed, Security Power Tools offers.

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This is roughly divided into three parts. The first three chapters are a gen- eral introduction to SSH, first at a high level for all readers (Chapters 1 and 2), and then in detail for technical readers (Chapter 3). The next nine chapters cover SSH for Unix. The first two (Chapters 4 and 5) cover SSH installation and serverwide configuration for system administrators.

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Linux is a member of the large family of Unix-like operating systems. A relative newcomer experiencing sudden spectacular popularity starting in the late 1990s, Linux joins such wellknown commercial Unix operating systems as System V Release 4 (SVR4), developed by AT&T (now owned by the SCO Group); the 4.4 BSD release from the University of California at Berkeley (4.4BSD); Digital Unix from Digital Equipment Corporation (now Hewlett- Packard); AIX from IBM; HP-UX from Hewlett-Packard; Solaris from Sun Microsystems; and Mac OS X from Apple Computer, Inc....

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No matter what field you work in, you cannot help but notice the impact that the Internet has had on society. It has opened up opportunities and markets that people only dreamed of before. As with any new technology, there is always a positive and negative aspect. The positive side is the tremendous business opportunities. The negative side is the huge security risk that is now posed to so many companies, yet few companies are truly aware of the potential danger.

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File Transfer Protocol or FTP is one of the original core protocols of the Internet and was first documented in 1971. It was designed to provide the functionality to exchanges files over the Internet and is specified in RFC 959. 1 It is still currently used for a number of purposes, including running user and anonymously authenticated FTP servers for the provision of files and applications for download. For example, it is utilized by software vendors to provide updates or patches to clients.

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Unix was developed by AT&T in the late 1960s and early 1970s, and was freely distributed among a number of major universities during this time. Concurrently, these universities were developing the network that evolved into the Internet.

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The protocol wars are over and TCP/IP won. TCP/IP is now universally recognized as the pre-eminent communications protocol for linking together diverse computer systems. The importance of interoperable data communications and global computer networks is no longer debated. But that was not always the case. When I wrote the first edition of this book, IPX was far and away the leading PC communications protocol. Microsoft did not bundle communications protocols in their operating system.

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Linux Cookbook™ Linux Desktop Hacks™ Linux Desktop Pocket Guide Linux in a Nutshell Linux in a Windows World Linux Multimedia Hacks™ Linux Network Administrator’s Guide Linux Pocket Guide Linux Server Hacks™ Linux Server Security LPI Linux Certification in a Nutshell OpenOffice.org Writer SELinux Version Control with Subversion Linux Books Resource Center

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Security-Enhanced Linux (SELinux) is an implementation of mandatory access control using Linux Security Modules (LSM) in the Linux kernel, based on the principle of least privilege. It is not a Linux distribution, but rather a set of modifications that can be applied to Unix-like operating systems, such as Linux and BSD.

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Like most operating systems in the last 40 years, Unix uses a hierarchical "tree-structured" file system (interestingly, tree-structure and other aspects of the Unix file system are a direct result of the original Unix developers being influenced by the Multics project they had been working on). Directories contain files and subdirectories which, may in turn, contain other files and subdirectories, and so on.

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We will review backup strategies, techniques, and other practices that make system and data recovery a reliable and viable option when data loss occurs. Superb backup tools exist for the Windows platform. A recent SANS Institute survey indicates that several backup programs are in wide use. Veritas’ (formerly Seagate’s) BackupExec and Computer Associates’ ArcServe programs were the most popular products in this survey. Legato’s Networker is also represented and is a good tool for managing backups in a combined Windows/Unix network....

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From the early days of the Internet, when only e-mail servers were on the network, a hacker’s ultimate goal was to gain root access to the UNIX host that ran these applications. With root access, the hacker had full control of the system and could often collect enough information to gain access to the rest of the network and other partner networks. E-business application hosts have increased the number of targets for hackers.

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As networks grow in size and complexity, the requirement for centralized security policy management tools that can administer security elements is paramount. Sophisticated tools that can specify, manage, and audit the state of security policy through browser-based user interfaces enhance the usability and effectiveness of network security solutions. Cisco provides a centralized, policy-based, securitymanagement approach for the enterprise.

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