System Administration & Technology Management презентация




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SYSTEM ADMINISTRATION & TECHNOLOGY MANAGEMENT Introduction to Windows/.Linux System Administration Ayaz


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System Administration Duties 1. Installing System Patches 2. Making System Checklists 3. Editing system configuration files 4. Keeping track of programs 5. Recording device file permissions 6. Keep track of world, group writable files, directories 7. Record encrypted checksum of all system binaries 8. Verify password strength for system, user accounts 9. Expiring inactive accounts 10. Restrict root/Admin access to the system console

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System Administration Duties

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System Admin Duties 21. Set correct system-wide umask 22. Allow no .rhost, .netrc files 23. Verify backup/restore procedures 24. Check sticky bit file permissions 25. Check cron and at job files for completeness 26. Enable system accounting, system auditing functions 27. Check system-wide path definitions 28. Install tools: portsentry, logcheck, TCPWrappers, tripwire,lsof, CIS Security Benchmark document 29. Check for IP forwarding in the kernel 30. Check X Windows security

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SysAdmin Tricks/Hints

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SysAdmin Tricks/Hints

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Windows System Administration Very vast topic New technologies introduced with every new release of Windows (currently Windows 7 and Windows 2008 R2) Technologies change according to the needs of the consumer and corporations Goals Align IT to business goals Attain the right balance between security and convenience

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Did you ever wonder… What enables you to login with the same username and password on multiple computers? How come you get the correct printer assigned automatically when you login? What puts a login message, enforces password security or forces you to logoff when idle?

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Active Directory It is the brain of the Windows Server network It’s a database that keeps track of a huge amount of information and provides a centralized way to manage networked workstations, users and resources Items are objects in an active directory database

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AD Domain A Domain is a security boundary or an administrative boundary e.g. I.T AD domain (IT.QUEST.edu.pk) is separate from MUET site domain (MUET.edu.pk) which is separate from HEC domain (hec.edu.pk). A domain has at least one Domain controller (which hosts the AD database)

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Server role Windows Server is designed around certain roles and features. A role is a primary duty that a server performs. Example Server Roles Domain Controller DNS server File and Print Services Terminal Services Web Server etc

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AD Domain

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DNS DNS is the application in TCP/IP-based networks that provides name resolution services. Active directory is dependant on DNS to provide both name resolution and locator service Clients and servers will not be able to locate each other without a functioning DNS infrastructure

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OUs, Users, Computers and Groups An organizational unit (or OU) is a logical container that you use to arrange groups of objects for convenient administration and access. OUs can contain the following Users, Computers, Groups, Printers, Network File Shares, Nested OUs In order to login, both the user and the computer have to be part of AD

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Example OU Windows server provides a GUI based administration tool called Active Directory Users and Computers (shown in the figure).


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