Firewall Network Securty

A firewall is a system or system group that runs the security access control between a secure internal network and an untrusted network such as internet.Firewall designed to permit the trusted data or data which is trusted by, refuse service vulnerabilities, preventing the internal network from outside attacks that could penetrate the firewall every time.  Generally also used to control access to anyone who has access to a private network from outside parties. Today, the term firewall is a common term that refers to systems that regulate communication between two different networks. Given the many companies currently have access to the 

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Basic of VB (Visual Basic)

Visual Basic is a programming language that can be used to create applications that run on Microsoft Windows ® operating system. If you're still a beginner in learning the language permrograman. Visual Basic provides a set of tools to ease and simplify the development of powerful applications to simplify your process of learning. Previously, let us learn in advance about the definition of Visual Basic. The word "Visual" refers to the method used to create graphical interface Graphical User Interface (GUI). Instead of writing lines of code to explain the appearance and location of elements in the interface in, you can easily add an object that had been built into the place and the position you want on your screen.

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JAVA BASICS

Understanding Java

Java is a technology introduced by Sun Microsystems in the mid-year 1990. According to the definition of Sun, Java is the name for a set of technologies to create and run the software on a standalone computer or in a network environment. We prefer to call Java as a technology rather than just a programming language, because Java is more complete than a conventional programming language. Java technology has three important components, namely:

· Programming-language specification

· Application-programming interface

· Virtual-machine specification

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PHP Basics

PHP stands for "PHP: Hypertext Preprocessor", which is a scripting language built-in HTML. Most of the syntax similar to C language, Java and Perl, plus some PHP functions that spesifik.Tujuan main use of this language is to allow web designers to write dynamic web pages quickly. Relations PHP with HTML web page is usually composed of html codes are stored in a file extension. Html. Html file is sent by the server (or file) kebrowser, then the browser to translate the code so that it produces a beautiful appearance. Another case with php program, this program must be translated by the web-server so that the html code sent to the browser to display.

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Network Topology use CTDP Networking

A network consists of multiple computers connected using some type of interface, each having one or more interface devices such as a Network Interface Card (NIC) and/or a serial device for PPP networking. Each computer is supported by network software that provides the server or client functionality. The hardware used to transmit data across the network is called the media. It may include copper cable, fiber optic, or wireless transmission. The standard cabling used for the purposes of this document is 10Base-T category 5 ethernet cable.

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Network Programming with Python

Distributed system is a system consisting of several computers and connected in a network where all computers contribute to each other to complete problem. In a distributed system, there is a sub-system capable of providing job to each system that wants to join and receive back the results. To build a distributed system, you should use something standard which has been implemented by various platforms. So the system can be made used extensively. In addition to the standard use of technology, consideration should also  problem of funds to be spent to build a distributed system to be suppressed minimum.  

The main thing that is very influential in the funding problem is the hardware. Good news that can be taken into consideration is the hardware (in this case a computer) that already out of date can be used to build a distributed system. Technology in the distributed system consists of several categories, including:

1) Socket
This technology is the forerunner of the distributed system. Generally, there are concepts a server that will open the socket and defines the various rules and clientclient perform their respective duties by following the rules. This technology very difficult and complex because it takes the ability to make such new protocol.
2) Remote Procedure Call (RPC)
In RPC there is a sub-system that defines the various rules in the form procedure, then other sub-systems is to call the procedure completing their respective duties.
3) Distributed Objects in a single programming language
Example implementation in Java Remote Method Invocation (RMI), DOPY, and Pyro.
4) The object is distributed without regard to differences in programming language
Example of implementation on Microsoft's DCOM and CORBA.
5) other technologies such as Message-oriented middleware, mobile agents, and so forth.
One of the standard technology that can be used in building a distributed system is the Remote Procedure Call (RPC). In the context of a distributed sytem, a sub-system defines some rules (in this case a procedure) and other systems possible join to solve the problem based on a defined procedure. Technology RPC has been considered more or less around 1976. This technology requires models addressing servers, transport protocols, and type marshalling. Several projects have been successfully distributed system which made them:
1) Abacus is a distributed system that combines 17 Pentium III computers with 2 processors each (total there are 34 CPUs) with Linux system used Internet-based multimedia applications. Abacus was built in 2000 and
rumored as one of the best computing devices in Hong Kong.
2) Berkeley Open Infrastructure for Network Computing (BOINC) developed by team from the University of California, Berkeley USA.
3) Einstein @ home is a project that uses distributed systems in performing the search for spinning neutron stars using data from LIGO and the detector GEO gravitational wave.
4) Climateprediction @ net is a distributed system used in the calculation climate change.

But behind the benefits, of distributed systems also raises new issues such as data concurrency, latency, and a variety of other possible errors. This is something that is considered reasonable in the development of information technology and a challenge for IT world to find a real solution and appropriate

Here I will provide a solution to network programming using Python, for ease in network programming, in order to manage the network properly. Please download the following tutorial. May be useful for you all.  

Download Free

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Firewall Policy and Guidelines on Firewalls

A firewall is a program that works to control a process, network traffic between different networks or host using a security. While firewalls are often discussed in the context of internet connectivity, and has been applied to other networks.

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