NetworkingStudyMaterial

20180131

Endian Firewall Installation

Endian Firewall Installation & Configuration


Endian Firewall Minimum Hardware Requirement :

CPU
  • Networks with up to 25 users and five VPN connections need a Pentium III 1 GHz processor. PCs running Endian on networks with up to 50 users require a Pentium IV running at 2.8 GHz or faster.

RAM

·         For smaller networks, Endian needs only 512 MB of RAM; for larger ones, Endian requires at least 1 GB.

Hard drive space

·         Small networks need at least 8 GB of available hard drive space, while larger ones need 20 GB of available hard drive.


Network Interface Card
PC running Endian Firewall need two 100 MB network cards.




Endian Firewall (EFW) ISO image Download:-





Insert the Endian bootable ISO disk into the CDROM drive and boot the system.




Press ENTER  to  continue and you will see the system loading




Chose language- English (Press TAB to get OK button)








Follow the Screen(Press TAB and OK)









Chose YES to continue






If you don’t have an Ethernet connection, you can use a serial cable to use and install and manage the software:





Here you will prompted to  configure minimum configuration setting. The default IP is 192.168.0.15 with default subnet mask  of 255.255.255.0 You should change both of these to match your local (internal) network.





Remove the boot CD and press enter to Reboot





When the system has reboot , you will get the following console . Open web browser and enter Management URL  as shown below:https://192.168.0.1:10443





If you received warning about a certificate,  click “Continue to this website”





You should then see the Endian welcome screen, click “>>>” to continue





Choose your language and Timezone and then click “>>>” to continue





Accept the license agreement then click “>>>” to continue










This is perticularly useful if you are recovering from a system crash. However, this is your first time installation, you won’t have backup, select  ‘NO’  in the drop list then click “>>>” to continue












The Endian is has two passwords for management, one is for the web management front end, and the other is for secure shell (SSH). Define password and click “>>>” to continue





Network setup wizard

The first step is to define what type of internet (Public) connection you have. Select Ethernet static and click “>>>”





As a minimum, the Endian will need a RED zone and a GREEN zone, which represent the public  and private network respectively , select “NONE” click “>>>”




This diagram below shows the setup of GREEN zone(LAN) which you assingned at the beginning of the installation, you can also change the IP here. At the bottom of the page you need to define the hostname, and the domain name of the system




Set the IP address, the subnet mask and Default gateway and you select which physical network card is associated with the RED zone. MTU and Spoof MAC address is optional, can leave blank




Here you will need to specify  DNS server address . DNS1 and DNS2,





System event can be emailed to an administrator. This is an optional step





This is the final step, select “OK,apply configuration” and wait for the setting to be saved.




END




Enter User Name as “admin” and Password as given during installation to login





Endian Firewall (EFW) ISO image Download:-





END

20180128

Computer networking is the practice of interfacing two or more computing devices with each other for the purpose of sharing data. Computer networks are built with a combination of hardware and software. Note: This page focuses on wireless networking and computer networks. See also these related topics: social networking business networking Computer Network Classification and Area Networks Computer networks can be categorized in several different ways. One approach defines the type of network according to the geographic area it spans. Local area networks (LANs), for example, typically span a single home, school, or small office building, whereas wide area networks (WANs), reach across cities, states, or even across the world. The Internet is the world's largest public WAN.

20180114

NIS Server Linux/Ubuntu

NIS Server Installation & Configuration in

🔺(Ubuntu Server 14.04)🔺
Introduction
                       Network Information System (NIS) NIS is a Remote Procedure Call (RPC)-based client/server system that allows a group of machines within an NIS domain to share a common set of configuration files. This permits a system administrator to set up NIS client systems with only minimal configuration data and to add, remove, or modify configuration data from a single location.


20180111

Networking Introduction

Networking refers to the total process of creating and using computer networks, with respect to hardware, protocols and software, including wired and wireless technology. It involves the application of theories from different technological fields, like IT, computer science and computer/electrical engineering.



A computer network is a set of computers connected together for the purpose of sharing resources. The most common resource shared today is connection to the Internet. Other shared resources can include a printer or a file server. The Internet itself can be considered a computer network.



Computer Network Defined
A computer network is a set of connected computers. Computers on a network are called nodes. The connection between computers can be done via cabling, most commonly the Ethernet cable, or wirelessly through radio waves. Connected computers can share resources, like access to the Internet, printers, file servers, and others. A network is a multipurpose connection, which allows a single computer to do more.


Types of Network Connections
Computer networks can be broken down historically into topologies, which is a technique of connecting computers. The most common topology today is a collapsed ring. This is due to the success of a network protocol called the Ethernet. This protocol, or network language, supports the Internet, Local Area Networks, and Wide Area Networks.


Star Topology
A star topology is a design of a network where a central node extends a cable to each computer on the network. On a star network, computers are connected independently to the center of the network. If a cable is broken, the other computers can operate without problems. A star topology requires a lot of cabling.


Bus Topology
A bus topology is another type of design where a single cable connects all computers and the information intended for the last node on the network must run through each connected computer. If a cable is broken, all computers connected down the line cannot reach the network. The benefit of a bus topology is a minimal use of cabling.


Ring Topology
A similar topology is called a ring. In this design, computers are connected via a single cable, but the end nodes also are connected to each other. In this design, the signal circulates through the network until it finds the intended recipient. If a network node is not configured properly, or it is down temporarily for another reason, the signal will make a number of attempts to find its destination.


A collapsed ring is a topology where the central node is a network device called a hub, a router, or a switch. This device runs a ring topology internally and features plugins for cables. Next, each computer has an independent cable, which plugs into the device. Most modern offices have a cabling closet, or a space containing a switch device that connects the network. All computers in the office connect to the cabling closet and the switch. Even if a network plug is near a desk, the plug is connected via a cable to the cabling closet.