Building Secure Servers with Linux

Building Secure Servers with Linux
By:"Michael D. Bauer"
Published on 2002 by \

Linux consistently turns up high in the list of popular Internet servers, whether it's for the Web, anonymous FTP, or general services like DNS and routing mail. But security is uppermost on the mind of anyone providing such a service. Any server experiences casual probe attempts dozens of time a day, and serious break-in attempts with some frequency as well. As the cost of broadband and other high-speed Internet connectivity has gone down, and its availability has increased, more Linux users are providing or considering providing Internet services such as HTTP, Anonymous FTP, etc., to the world at large. At the same time, some important, powerful, and popular Open Source tools have emerged and rapidly matured--some of which rival expensive commercial equivalents--making Linux a particularly appropriate platform for providing secure Internet services. Building Secure Servers with Linuxwill help you master the principles of reliable system and network security by combining practical advice with a firm knowledge of the technical tools needed to ensure security. The book focuses on the most common use of Linux--as a hub offering services to an organization or the larger Internet--and shows readers how to harden their hosts against attacks. Author Mick Bauer, a security consultant, network architect, and lead author of the popular Paranoid Penguin column in Linux Journal, carefully outlines the security risks, defines precautions that can minimize those risks, and offers recipes for robust security. The book does not cover firewalls, but covers the more common situation where an organization protects its hub using other systems as firewalls, often proprietary firewalls. The book includes: Precise directions for securing common services, including the Web, mail, DNS, and file transfer. Ancillary tasks, such as hardening Linux, using SSH and certificates for tunneling, and using iptables for firewalling. Basic installation of intrusion detection tools. Writing for Linux users with little security expertise, the author explains security concepts and techniques in clear language, beginning with the fundamentals.Building Secure Servers with Linuxprovides a unique balance of \

This Book was ranked 1 by Google Books for keyword base server.

Linux Servers

This article discusses the understanding of linux. understanding of linux is a free open source operating system which is free for distributed under the GNU license. so you are allowed to install on your computer or copy and distribute it without having to pay. Linux is a derivative of Unix and can work on a variety of hardware ranging from inter koputer x86 to RISC. With the GNU (Gnu Not Unix) you can get the program, complete with source code (source code). Not only that, you are granted the right to copy as much as you want, or even change the code sumbernya.Dan was all legal under license. Although free, GNU license allows those who want to attract fee for copying and sending program.
The most important freedom of Linux, especially for programmers and network administrators, is the freedom to obtain the source code (source code) and the freedom to change it. This implies a few important things. Safety first, the second dynamics.
If commercial software does not allow you to know sumbenya code then you'll never know if the program you buy from them it is safe or not (often called security by obscurity). Your life in the hands of the vendors. And if there is a notice about the bugs of the commercial software, it is often too late. With Linux, you can examine the source code directly, along with other Linux users. The development of Linux users as an open community, making bugs will quickly known, and as soon as it did the programmer will fix the program. You yourself also determines the appropriate code in accordance with the basic hardware and other software to be implemented. Like a car, you can modify at will, even though the machine, in order to obtain the desired shape.
Disclosure of the source code also allows the operating system is growing rapidly. If a program with a closed system and is only developed by a particular vendor, at most about one thousand to five thousand people. As for Linux, with open source code, developed by volunteers around the world. Known bugs faster and penambalnya program (patch) more quickly available. Approach to the development of this operating system called Bazaar. Conversely Chatedraal very closed system and only focus on one or two developers only.
linux has now evolved into many distros (distributions), for example, is a distro Redhat, Debian, Suse. is currently a very popular linux distro in use in Indonesia is distro Ubuntu is derived from Debian.

Linux Virtual Server

1.Understanding the Linux Virtual Server

Linux virtual server (LVS) is a major open-source alternatives that provide solutions to make the system load balancing. As noted in the home site virtual linux server Project, Linux virtual server (LVS) is "a highly scalable and highly available server built on a cluster of realservers, with the load balancer running on the Linux operating system" The point of the real servers are machines computer that actually serve the existing request. Real servers can be connected using a LAN or WAN speeds. And machine spearhead server cluster is a director, in the form of a single server that connects real server with the client from the intranet or internet (outside the cluster system).

 2. Linux virtual servers with OSI Layer Preview.

The basic concept of the network is never separated from OSI Layer, including virtual linux server system that works by balancing network loads. OSI is divided into seven layers, each of which contains a communication protocol for exchanging information between two or more computers, among others:

    Physical layer (layer 1), a bottom layer that serves to mengubat data bits into electrical signals that will pass through a transmission medium.
    Data Link layer (layer 2), this layer provides a data format, frame creation, control and data flow errors.
    Network layer (layer 3), the main task of this layer is to address the provision of setting and managing network equipment network traffic.
    The Transport layer (layer 4), the transport layer is responsible for the integrity of the data in the transmission process.
    Session layer (layer 5), the layer is responsible for building, maintaining, and terminating sessions between applications.
    Presentation layer (layer 6), serves to resolve differences of data formats, compression and data encryption.
    Application layer (layer 7), is the uppermost layer of the OSI kelingkungan user interface.

Linux Web Server

How To Create an Apache based Linux website server

Create a web server with Linux, Apache, FTP and bind DNS: This tutorial covers the Linux server configuration required to host a website. The Apache web server, FTP server and DNS configuration are covered. The Apache web server is required to serve the web pages, the FTP server is required for users to upload content and the DNS server is required to resolve the domain names so that a URL entered into a web browser will point to your web server and properly serve the correct pages. The configurations presented will include virtual hosting which will allow a single Linux server to support multiple web site domains.

Linux Server Software

Your operating system Linux users? If you use the OS, maybe you should know the proper usage to run on the server that you use in your office or place of business. Some views may be a consideration for choosing the right Linux, as described below:

Corporate Business

Say you have a company with several hundred to several tens of thousands of employees. What do you need? The answer is quite simple. The first choice you have Red Hat Enterprise Linux.

Why? Since Red Hat is powerful enough these days.

Red Hat has the support of big business and it's easy to get certified technicians, administrators, and engineers are competent on RHEL (Red Hat Enterprise Linux). It is supported on a variety of hardware support. Are you using x86 rack servers, blade servers, IBM POWER systems, or mainframe, there RHEL for you. In short, Red Hat is the best standard of Linux business.

Is RHEL is too expensive for you? Here, you get what you pay for. But there are two others who enter the business category of Linux distributions to note that Oracle Linux and SUSE Linux Enterprise Server (SLES).

Small Business Server

Written Onno W. Purbo - Internet expert and Linux - is very suitable as a guide to configure Linux server to schools and SMEs (small and medium enterprises). This book is intended that the program can be directly run with minimal configuration, so that the schools and the offices of a small to medium sized businesses can enjoy the Intranet and Internet for cheap. The book includes a CD, containing all of the programs discussed in this book plus alternative programs.

Each chapter of this book contains practical and easy to follow instructions to understand how to work, how to install and how to configure a variety of important applications in the Internet world. Here is a summary of each chapter:

* Basic understanding of LAN networks in schools and SMEs, routers, servers and applications on the Internet and Intranet as a proxy, mail, web, and CMS (content management system).
* Types of CMS and how to install a CMS application in general.
* How to build a PC Linux Router, ranging from how to turn on Internet sharing or NAT, configuring a simple firewall, routing, to enable the DHCP server.