Lab 1.5 Conneting network of internet with LAN and Disable Firewall

1. Basic Concept

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a home, school, computer laboratory, or office building, using network media. The defining characteristics of LANs, in contrast to wide area networks(WANs), include their smaller geographic area, and non-inclusion of leased telecommunication lines.

ARCNET, Token Ring and other technology standards have been used in the past, but Ethernet over twisted pair cabling, and Wi-Fi are the two most common technologies currently used to build LANs.

In computing, a firewall is a network security system that controls the incoming and outgoing network traffic based on an applied rule set. A firewall establishes a barrier between a trusted, secure internal network and another network (e.g., the Internet) that is assumed not to be secure and trusted. Firewalls exist both as a software solution and as a hardware appliance. Many hardware-based firewalls also offer other functionality to the internal network they protect, such as acting as a DHCP server for that network.

Many personal computer operating systems include software-based firewalls to protect against threats from the public Internet. Many routers that pass data between networks contain firewall components and, conversely, many firewalls can perform basic routing functions.

2. Purpose

1. To learn "How to Connect internet network at Routerboard".
2. To operate RouterBoard
3. To configure LAN in Routerboard.

3. Topology

4. Steps

A. Enable LAN

1. Open Network and Sharing Center

2. Click at "Change Adapter Setting"

3. Disable all connection in your PC / Laptop and just enable LAN connection.

B. Reset the Router

1. Open your Routerboard with Winbox

2. Click System --> Reset Configuration

3. Checklist "No Default Configuration" for losing all configuration on the routerboard. And then click "Reset Configuration".

4. Click Yes

C. Change interface name

1. Command Line Interface

a. Open "New Terminal"

b. Follow Shyntax below

2. Graphical User Interface

a. Interfaces --> Click the Interface --> Change the name --> Apply --> Ok

D. Disable and Enable Interface

1. Command Line Interface

a. Following shyntax below

b. Enable interface 5 with "interface enable 2", and then print

c. Enable WLAN 

2. Graphical User Interface

a. Choose one of the interface --> click symbol "X" to disable

b. Click the Interface --> and then click "V"

c. Enable WLAN

E. Create VLAN (Virtual LAN)

1. Command Line Interface

a. Follow shyntax below.

F. Create Switch in RouterBoard

1. Command Line Interface

a. Type the shyntax "interface ethernet set "interface number" master-local="Interface for master".

G. Add IP Addresses

1. Command Line Interface

a. type shyntax ip address add address="ip address/subnet" interface="interface"

2. Graphical User Interface

a. Open IP --> Addresses

b. Click symbol "+" --> type IP Address and choose Interface --> Apply --> OK

c. Finnish

H. Add Gateway

1. Command User Interface

a. Type the shyntax 

2. Graphical User Interface

b. Open IP Route --> Click symbol "+" --> type dst-address=0.0.0.0/0 and gateway="your gateway" --> Apply --> OK

I. Ping www.google.com

J. Create Domain Name Server

1. Command Line Interface

a. Type the shyntax

b. ping your gateway

2. Graphical User Interface

a. Open IP --> DNS

b. Type your DNS --> Apply --> OK

c. Ping your gateway

K. Remove IP Address

1. Command Line Interface

a. Type the shyntax

L. Create DHCP IP Address

1. Command Line Interface

a. Type the shyntax 

(If you don't connect to Wireless connection, will be appeared "searching...")

2. Graphical User Interface

a. Open IP --> DHCP Client

b. Click public --> Apply --> OK

3. Remove DHCP Client

M. Create IP Address for Public again

N. In Client

a. Change IP on Client

b. Ping Client Gateway, Routerboard IP, and Routerboard Gateway 

Request time out.... Because firewall in Routerboard on. You must turn off the firewall

c. Shyntax to turn off firewall (do this in Winbox Terminal)

d. ping Routerboard gateway, Ping internet, and Google DNS

Configure Network Has Been Finished