open source operating system linux pdf

... suspicious remote systems ; You can use Nmap as a basic port scanner for a system on your internalnetwork, or you can have it identify the operating system version of aremote system on another ... about additional opensource IDS applications at the following sites: ■ www.securityfocus.com ■ http://packetstorm.securify.com ■ www.linuxsecurity.com General Dependencies for Open Source IDS Applications ... 11Perhaps the best way to ensure system security is to have your system or networkreport certain changes to you In this chapter, you will learn more about opensource intrusion detection tools

Ngày tải lên: 08/08/2014, 21:23

... smaller, simpler systems Modern software systems, such asoperating systems and standard applications, are large and complex The Linux operating system, forinstance, contains over 30 million source lines ... http://grsecurity.org Like SELinux, GR Security is supported only for Linux 2.x Developers of open source operating systems other than Linux are implementing products similar to SELinux For example, the ... SELinuxitself SELinux also includes a policy, implemented as a set of files, that defines users and roles and their permissions SELinux and User-Mode Linux (UML) User-Mode Linux is an open source

Ngày tải lên: 08/07/2014, 01:42

... by SELinux developers rather thansystem administrators 8.2.2 Syntax of Filesystem Labeling Declarations When an SELinux system mounts a filesystem, SELinux must determine whether the filesystem ... Trang 249.1 The SELinux Policy Source TreeChapter 5 explained the structure of the SELinux policy source tree The source tree typically resides in the directory /etc/security/selinux/src/policy; ... fs_use_xattr ext3 system_u:object_r:fs_t; fs_use_xattr xfs system_u:object_r:fs_t; fs_use_task pipefs system_u:object_r:fs_t; fs_use_task sockfs system_u:object_r:fs_t; fs_use_trans devpts system_u:object_r:devpts_t;

Ngày tải lên: 31/05/2016, 08:56

... LESSON 9 Linux Operating System Vulnerabilities and security Objectives ♦ Describe the fundamentals of the Linux operating system ♦ Describe the vulnerabilities of the Linux operating system ... operating system ♦ Describe Linux remote attacks ♦ Explain countermeasures for protecting the Linux operating system 2 Review of Linux Security Fundamentals ♦ Linux is a version of UNIX – ... sc/etc/shadow Root:2bcadvr345:0:0:root: /root: /bin/bash - John The Ripper - Viper - Slurple 6 7 Linux File System ♦ Ls –l ♦ -r-x-r-x-wx ♦ Chmod 777 a.txt Firewall: iptables 8 9 10

Ngày tải lên: 29/07/2014, 08:20

... and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005Components of a Linux System Trang 12Components of a Linux System (Cont.)„ Like most UNIX implementations, Linux is composed ... the history of the UNIX operating system from which Linux is derived and the principles which Linux is designed upon „ To examine the Linux process model and illustrate how Linux schedules processes ... PC and PowerMac systems kernel, 64-bit memory support Trang 721.7 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7 th Edition, Feb 6, 2005The Linux System „ Linux uses many

Ngày tải lên: 28/06/2014, 02:20

... Trang 2020 Linux starter packLinux desktop Your filesystem Ready to delve right into the core of your new Linux system? The Nautilus file explorer is here to help! Nautilus is the Linux equivalent ... centre of the system, which is why it’s so popular for servers. Looking for special effects? Linux is just what you’re after. Trang 7 Linux starter pack 7Welcome to Linux 4 Linux is secure ... read a bit more about Linux fi rst – and I’d recommend it! – turn to p6. THE BEGINN ER’S GUIDE TO ALL THING S OPEN SOU RCE! The #1 source for Linux Trang 4Ready to master Linux? Start your engines

Ngày tải lên: 28/06/2014, 14:20

... Windows, 20–21 OpenBSD, 23 OpenSSH, 301–305 OpenSSH Client, 43–44 OpenSSH server, 302–304 OpenSSL, 135 OpenView, 234 Operating system tools Bastille Linux, 28 dig, 37–39 finger, 39–41 OpenSSH Client, ... providing resources to project, 386–387 Open source operating systems, 27 Open source projects, 264 broader need for, 265 NCC (Nessus Command Center), 266–277 patronizing companies supporting open source ... 387 permission to release code as open source, 265 providing resources to, 386–387 Open source security tools, xix–xxi Open source software, xi, 12 100 percent outsourced IT, 20 advantages, 15–19

Ngày tải lên: 04/07/2014, 13:20

... www.turtlefirewall.com/ Platforms: Most Linux-compatibles that support Iptables License: GPL 2.0 Contact information: andrea@friweb.com System requirements: Linux operating system with kernel 2.4 or newer ... it wipes everything off the hard disk and installs its own operating system. This is basically a stripped down and hardened version of Linux, but you don’t have to know anything about it to run ... the Linux Webmin service, which is a little Web server that allows you to make configuration changes to your server via a Web browser. While this might introduce some insecurity into your system

Ngày tải lên: 04/07/2014, 13:20

... Trang 1• Syslog For UNIX/Linux systems, you should use the following directive: output alert_syslog: LOG_AUTH LOG_ALERT For Windows system, you can use any of the following formats: ... Ported by: Michael Davis and Chris Reid Version reviewed: 2.0.0 Other resources: See the listing in the section “Snort: An Open Source IDS for UNIX” earlier in this chapter Trang 10Figure 7.2 Webmin ... anywhere, you could probably turn these off However, finger servers often are running hidden from the system administrator, so you could leave these on as they shouldn’t generate false positives if

Ngày tải lên: 04/07/2014, 13:20

... dif-ferent operating systems or create your own It is available for both UNIX and Windows Since it is a command line tool only, the basic operations are the same for both operating systems The ... that the clear text password is not being passed across the network On some operating systems, however, this hashing system is weak and the encryption is easily cracked Worst case, if someone ... the source code files from the Web site or the book’s CD-ROM 2.Issue the following command from the src directory it created: make This displays a list of systems supported Note: If your system

Ngày tải lên: 04/07/2014, 13:20

... wireless net-works while using it NetStumbler isn’t considered truly open source since the author doesn’t currently make the source available However, it is freeware and it is worth mentioning ... this chapter) It also has a very open source mentality in terms of its user community and Web site The Web site is highly informative and has lots of good resources for wireless security beyond ... worth mentioning since it’s the most widely used tool on the Windows platform There are many open source add-ons N e t S t u m b l e r : A W i r e l e s s N e t w o r k D i s c o v e r y P r

Ngày tải lên: 04/07/2014, 13:20

... services Finger CVE-1999-0612 Useless services Telnet CAN-1999-0619 Useless services Echo port open CVE-1999-0103, CAN-1999-0635 Useless services Check for Webmin Useless services rlogin CAN-1999-0651 ... Useless services Daytime CVE-1999-0103 Useless services Writesrv Useless services Discard port open CAN-1999-0636 Useless services xtux server detection CVE-2002-0431 4260 Windows SMB Registry ... TCP/IP packet vulnerability CAN-2000-1039 2022 Trang 3Windows WinAMP3 buffer overflow 6515 Windows Opening Group Policy Files (Q318089) CVE-2002-0051 4438 Windows SMB Registry : Classic Logon Screen

Ngày tải lên: 04/07/2014, 13:20

... past twenty years) The classical operating system kernel is to be found in most of the systemstoday: Unix, POSIX and Linux, Microsoft’s NT, IBM’s mainframe operatingsystems and many real-time kernels ... such systems as the TITAN Supervisor [34], thethe operating system [19] and Brinch Hansen’s RC4000 supervisor [5]; it isthe approach to kernels described in standard texts on operating systems ... Operating systems are, arguably, the most critical part of any computer tem The kernel manages the computational resources used by applications.Recent episodes have shown that the operating system

Ngày tải lên: 23/07/2014, 23:20

... steps for securing a Linux system—called hardening the server—using both manual methods and open source security solu-tions.The hardening process focuses on the operating system, and is importantregardless ... the System with BastilleBastille is an open source program that facilitates the hardening of a Linux system It performs many of the tasks discussed in this chapter, including downloadingoperating ... job tasks.fire-■ Limit system resource usage If you limit system resource usage, youcan reduce the chances of server failure from a DoS attack If youchoose to limit system resource usage in Bastille,

Ngày tải lên: 08/08/2014, 21:23

... with the open source packet sniffer Ethereal Note that in order for the following example to work properly, you musthave two systems: the Telnet client and the Telnet remote host All Linux installa-tions ... Implementing One-Time Passwords (OTP and OPIE) ; In the Linux world, the most universal way to implement one-time word (OTP) support in your Linux systems is to install the One-TimePasswords in Everything ... possible to enhance authentication using party open source software.You also understand some of the pitfalls involved indeploying such software in various systems For example, in the last chapter youdiscovered

Ngày tải lên: 08/08/2014, 21:23

... Red HatLinux 7.0 using the linux-2.2.16 kernel, which will be upgraded to the linux-2.4.3 kernel (this kernel is also included on the CD [linux-2.4.3.tar.gz]) A custom installation of Linux with ... followingKernel source code item: 1 Kernel source code The Linux kernel source RPM must be installed to configure the kernel.To find out if it is installed, enter rpm -qa | grep kernel-source If you ... your system’s Red Hat Linux version and kernel are supported 5 For this demonstration, the Linux kernel will be upgraded to 2.4.3, and then FreeS/WAN will be compiled linux-6 Access the kernel source

Ngày tải lên: 08/08/2014, 21:23

... quicklyupgrade your system in case a problem is discovered.Deploying IP Forwarding and Masquerading ; IP forwarding is the ability for a Linux system to act as a router ; A Linux system with simple ... in Firestarter Trang 27■ Open service to machine Allows you to open a specific port orrange of ports to a specific host or range of IP addresses.■ Open service to anyone Opens a port to all hosts ... Need for a Firewall ; Linux natively supports the ability to route and/or filter packets Modern Linux systems use either Ipchains or Iptables to do this Ipchains supports Linux kernel versions

Ngày tải lên: 08/08/2014, 21:23

... boards toremind people about changes Remain Informed Concerning the Operating System New bugs are found every day in any operating system It is possible that a bugmay be found in Ipchains/Iptables ... complexity to your system, andsuch changes open a security hole unless you take the time to properlystudy the changes and alter your system’s configuration ■ Network with fellow systems administrators ... authentication.■ Open ports/daemons Many firewalls and/or routers allow sary ports to remain open, which can expose your firewall to threatsunnecessarily unneces-■ Monitoring system hard drives,

Ngày tải lên: 08/08/2014, 21:23

... Hosts ; OpenSSH implementations are significantly different between operating tems.The OpenSSH Portability Team uses the OpenBSD OpenSSH code to develop portable versions for other operating systems.You ... logging, and monitoring. Updating the Operating Systems ; Operating system releases usually contain software bugs and security vulnerabilities. ; Operating system vendors or organizations offer ... kernel. compa-Soft Skills: Coping with Open Source Quirks ; As you use open source code, remember that this code may represent a work in progress. ; Sometimes, open source code changes radically, forcing

Ngày tải lên: 08/08/2014, 21:23

... the open source world, users often "test drive" products as part of their decision process The website Open Source CMS32 provides sample installations of all the most popular open source ... for those evaluating various open source CMS solutions Open Source CMS tracks the visitors' level of interest in each CMS system by counting the number of times the system was viewed on their site ... with the difference being highlighted in red 32 See, http://www.opensourcecms.com Trang 10Shows total views for each system at OpenSourceCMS.com Note two periods are compared here, February and

Ngày tải lên: 14/08/2014, 23:20