Troubleshoot IP address Conflict

When you try to connect to the Internet, you may get a message indicating an IP address conflict or the connection constantly fails. This is probably because two computers on the same network are trying to get the same IP address. In fact, most routers are configured for DHCP, ie distribute IP addresses automatically. If for some reason, you need a fixed IP address on one of the computers in the network, DHCP can try to assign this IP address to another one, causing this problem. How to troubleshoot IP address conflict Windows To resolve this issue, click Start> Control Panel> Network Connections. Then right click on the connection in problems and select Properties. In the window that opens, select Internet Protocol (TCP / IP) and click Properties. If the…
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Filtering MAC Address

The option to filter MAC address (Media Access Controller) is used to control network access based on the MAC address of the network adapter. A MAC address is a unique identifier assigned by the network adapter manufacturer. This feature can be configured to allow or deny access to the network / Internet. This option is listed in several specialized sites as 'low security' because of  relatively easy to skip this filter for someone with basic knowledge of wireless networks, however, combined with other security protocols can help improve this aspect. MAC filtering takes its name from the Media Access Control (MAC) address of the network cards of different devices that are ready to connect to a network, such as a computer, tablet or smartphone. Each device has a unique MAC…
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Ping Command: How to test for problems using

In some cases, if you are experienced problems and  need to call ISP Support they can claim that everything is fine on their site and you will be stuck with your internal network problems. So, you as user may need be able to debug and fix certain network problems and it could be of a great help to you. Network layout (topology) First make sure that you know your network layout. Most probably it will be one of the following: a) Modem -> Router (Cable+WiFi) -> PC b) Modem (Cable+WiFi) -> PC If router is not present in your network, it means that modem is working  as a router and it is important to know how to connect to modem administrative interface. In Windows, to get some details about your…
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Finding your router IP Address

For this purpose we use our available operating systems other than Windows 7, Linux Ubuntu 14.04(debian based) and Android MS Windows 7 On Windows 7 please go to 'Start' button and type in search box: cmd This will open a MSDOS command window, then type: > ipconfig Linux Ubuntu Studio 14.04 To see your router IP open a command window and type any of the commands: $ route $ netstat -nr $ ip route show Android 4.1 On android we have two news, one bad and one good, the bad is that Android don't have a IP analyzer by default, only we can access the device IP going to settings/device info/status. But this don't have the router IP Address info. The good news is there is many free apps that…
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Improving WiFI performance

There are several factors that influence the performance of a WiFi router, ranging from changing the transmit power to change the transmission channel. All of them together can substantially improve the performance of our wireless network. In this article we will see how to configure your router taking as an example a D-Link DIR-505 model. However, the parameters to be modified are standard for any model or make commercial router. First we see some basic concepts to understand the nature of the optimal performance of a commercially available WiFi router for home. As a first step, access your router typing 192.168.0.1 on your favorite browser. Transmit Power This is the power which the router uses to transmit any signal, normally any router operates at 100% power. However, in some cases,…
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192.168.0.1: Accessing the Router and Changing the Configuration

The access to the router is carried out through its IP address, which is almosy always 192.168.0.1 or 192.168.1.1. From a browser you access the IP address and enter the configuration. We will show you, in simple words, how to enter the router, how to locate and change your access password, how to change the name and password of the WiFi network, as well as some basic operations, the style of firmware update or open and close Ports. How to access the router? Most manufacturers offer their clients a program, web or app to enter the router. For example, D-Link does it through the web manager. In this tutorial we try the configuration of the D-Link DIR-505 router. There is a manual way of doing it that is more or…
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The ifconfig command in Linux

ifconfig ( "interface configuration") is a program available on several versions of  UNIX operating system, which allows you to configure or deploy numerous parameters of resident network interfaces in the core, such as IP address (dynamic or static), or mask network. If called without arguments usually it shows the current configuration of active network interfaces, with details such as the MAC address or traffic circulated by them so far. Network interfaces in Linux are often referred to as eth (eth0, eth1, etc.). Follow the steps below to learn how to use the ifconfig command. Step 1: On a Terminal emulator window type the command: >> ifconfig Step 2. Parameters If ifconfig is executed by adding only the interface name, it will display the configuration information for that interface. If executed…
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Configuring Dynamic DNS directly on a router

Some routers have features for handling dynamic DNS. Such is the case of the D-Link DIR-505 router that we will deal with in this tutorial. The Dynamic DNS feature allows you to host a server using a domain name that you have purchased (www.whateveryournameis.com) with your dynamically assigned IP address. Most broadband Internet Service Providers assign dynamic (changing) IP addresses. When you use a Dynamic DNS service provider, your friends can enter your host name to connect to your server, no matter what your IP address is. Dynamic DNS Server Utility The most common use of DDNS is remote access to IP, DVRs, NAS, routers, computers, tablets, cameras, smartphones and any device connected to Internet. Get a Dynamic DNS Service Some small applications called Automatic Update Client both with DDNS…
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Setting Up an ADSL Modem as a Router

Most ADSL modems, being in bridge mode is not assigned any ip address to it. What we do will be to convert it into router mode so that it gets its own ip address and is used as a router for up to 255 machines without the need to buy an additional device. For our purpose we will use an ADSL 2+ modem model AR21TU2. Let's start, to be able to enter our modem we must configure the ip of our pc as follows: Ip Address: 10.0.0.10 Subnet Mask: 255.255.255.0 The rest we leave it blank as in the image after we accept to make the configuration adapt to the system. Now we must connect directly to the modem with a network cable and write in a browser the address…
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