Linux Securities - 1119 Words

Security of a system when you are open to the internet is paramount in the world of servers. Linux has many layers of ever evolving security in order to keep up with the would be attackers in cyberspace. This is one of the reasons that Linux is one of the most used servers for internet sites and has few viruses engineered towards it. IP Tables Developed by the Netfilter organization the IP tables package for Linux is an evolution of the IP chains which came from the IPv4 Linux firewall package. Paul Russel was the initial head author of the organization and also behind the IP chains project The Netfilter organization began to come together in 1999 and through collaboration and research recognized the shortcomings of the IP chains†¦show more content†¦Traditionally Linux security has been run using DAC ( Discretionary Access Control ), which is based on users and groups to control which users and processes can access files and how they do it. This runs into a problem since the owner of a file has control over its permissions which can be less than ideal. SELinux ( Security-Enhanced Linux ) implements MAC ( Mandatory Access Control ), which is under the direct control of the systems administrator and is located in the kernel where it can control and enforce security, giving only the permissions needed to processes and users. In the way of vulnerabilities I could not find much for SELinux, which is a testament to the power of MAC. As secure as it may be, for most home users this system is a bit complicated and can block services and make it look like a common error, making troubleshooting problematic. I would still recommend using a firewall in conjunction with SELinux as security is best utilized when it is layered in order to make attacks more difficult. Linux has a rich history of collaborations between different organizations and input from users worldwide. This has led to a world class piece of open source software that has proven itself to have both the reliability and security to provide the peace of mind for users and corporations worldwide to use for day to day operations andShow MoreRelatedLinux Security1588 Words   |  7 Pagessingle sub-tree of the file system.† â€Å"In order for it to work properly, some common programs and libraries need to be copied or linked to the appropriate locations in the new directory tree.† (Haas) The term sandbox is a metaphor for the type of security that chroot jail uses. Once you put a program or utility into the jail, it only knows of what is contained in the cell, the rest of your system becomes invisible to it. It does this by changing the apparent root directory for the current runningRead MoreLinux Security985 Words   |  4 PagesRobert Hoffman Linux Research 2.1 Security for computers is one of the most important aspects of a system that has to be in place. For this paper I will be writing about four security features that Linux systems use; these are SELinux, chroot jail, openSSH, and iptables. I will briefly describe what they do to provide security. SELinux (security enhanced Linux) was developed by the NSA, who chose Linux as its operating system to create a more secure operating system. SinceRead MoreLinux Security Technology1868 Words   |  8 Pages|Linux Security Technology | | 1. SELinux SELinux, an implementation of  Mandatory Access Control  (MAC) in the Linux kernel, adds the ability to administratively define policies on all subjects (processes) and objects (devices, files, and signaled processes). This mechanism is in the Linux kernel, checking for allowed operations after standard Linux Discretionary Access Controls DAC are checkedRead More4-20-2014 Protection and Security mechanisms in Linux and Windows Intro to Operating2800 Words   |  12 Pages4-20-2014 Protection and Security mechanisms in Linux and Windows Intro to Operating Systems Stuart Gourlay (12382696) Rory O’Reilly (12370056) â€Æ' Table of Contents Windows 2 Overview of Windows 8 2 New Features 2 System Requirements 2 Security Mechanisms in Windows 8 3 Address Space Layout Randomization 3 Heap Randomization 3 Kernel Mode Security 3 UEFI Secure Boot 4 Windows Defender 4 Linux 5 How Linux is Broken Down 5 OverviewRead MoreEssay about Security Enhanced Linux (Selinux), Chroot Jail, and Iptables682 Words   |  3 PagesSecurity Enhanced Linux (Selinux), Chroot Jail, and Iptables Security Enhanced Linux (Selinux), Chroot Jail, and Iptables Three of the most important types of Linux security technologies are Security Enhanced Linux (SELinux), chroot jail, and iptables. This security measures aide in the subversion of theft and malicious activity. We will discuss these items in depth to address who created them and for what reason. Along with how these technologies changed the operating system to enforce securityRead MoreLinux Security3394 Words   |  14 PagesSecuring Linux Platforms and Applications Project Project Part 1 Task 1: Outline Security Policy This security policy is essential to the First World Bank Savings and Loan. It is used to break up the security plan not measurable, specific, and testable goals and objectives. This security policy would be used to provide all current and prospective customers online banking services while keeping the First World Saing bank competitive in the financial marketplace. This solution is also an imperativeRead MoreRed Hat Enterprise Linux 6 Security Guide50668 Words   |  203 PagesRed Hat Enterprise Linux 6 Security Guide 1 Red Hat Enterprise Linux 6 Security Guide A Guide to Securing Red Hat Enterprise Linux Edition 3 Red Hat Engineering Content Services 2 Legal Notice Legal Notice Copyright  © 2011 Red Hat, Inc. Based on the Fedora Security Guide (current version at http://docs.fedoraproject.org/enUS/Fedora/16/html/Security_Guide/index.html), written by Johnray Fuller, Eric Christensen, Adam Ligas, and other Fedora Project contributors. T he textRead MoreThe Linux Security Checklist From Sans2024 Words   |  9 Pagesinto the system. The Linux Security Checklist from SANS has basic step by step guidance one can follow in securing an OS (Homsher Evans, n.d.). 5.1. Never run Jenkins with root/administrator privileges One should never run with administrator or root privileges regardless of the operating system platform. If a hacker manages to get in, he or she will still need to find ways to perform privilege escalation to cause more harm. Hopefully, this buys enough time for security professionals within theRead MoreMajor Elements Of Memory Management1648 Words   |  7 PagesD. Major elements of memory management Linux operating system is using virtual memory to support programs running in the system. The virtual memory provides lots of optimal ways to maximize the memory mapping and utilization. The virtual memory can allocate much more memory to processes than its actual physical memory size. Linux provides virtual memory great support to allow the processes running in the system, such as mapping the process’s memory to physical memory (Arora, 2012). There are twoRead MoreFirst World Bank Savings And Loan1149 Words   |  5 PagesFirst World Bank Savings and Loan Mission: First World Bank Savings and Loan strives to become the leader in the competitive financial institution market by applying new and updated security policies to their advanced Linux based server applications. Company Background: First World Bank Savings and Loan is a financial institution in the United States, a leading financial service firm that estimates over $100,000,000 a year in online credit card transactions for loan applications and other banking