Posts Tagged ‘Internet’

Wireless Security

Friday, October 9th, 2009

by Jeremy Schlinz
wireless routerDo you have a wireless network at your home? If not, have you considered one? Security should be a top concern if you have installed or plan to install a wireless network.

Home networking has become commonplace in the last decade, thanks to the strides made in wireless technology. A wireless connection can eliminate the need for in-wall cabling or running cords along the floor. Multiple PC’s can connect to the network from any room in the house. But without proper setup, this convenience also increases the likelihood your home network may be compromised by a third party.

Unfortunately, unsecured or poorly-secured home networks remain commonplace, allowing malicious users to easily break in and steal data from any computer in your home. Spammers are also able to break in and use your internet connection to solicit e-mail advertisements which can then result in restrictions placed on your internet connection. Even at the lowest level of risk, an unsecured network could allow a neighbor – or multiple neighbors – to “piggyback” on your internet connection and steal your bandwidth, meaning a slower connection for you and possibly increasing the charge you pay your provider.

Many types of wireless routers are plug-and-play, meaning you simply plug them in and use them right out of the box. That’s certainly easy, but it’s not an advisable method for setting up your wireless network. In order to set up a secure connection, you must set passwords on both the equipment and your wireless network. WARNING!: Improperly changing any of the settings within your router – including your wireless security settings – can take down your network and leave your router inaccessible! Please contact ABS Internet first if you have any questions, or to request an installation.

You can log into your wireless router yourself using the default username and password, which are usually, user: blank/admin and password: admin. The default web address of your router is usually 192.168.1.1. Check your router documentation for more specific configurations. Generally under the administration section, you may change the router password. Make the password long and difficult to guess, of both upper and lowercase letters. . If you forget this password, you will not be able to get back into your router and it will have to be reset, so you might want to write your password down and keep it in a safe place. Once you’ve set your password, navigate to the wireless security section of the router interface.

There are three common types of wireless security: WEP, WPA, and WPA2. WEP is only slightly better than having nothing at all. It may keep the neighbors out, but if anyone is set on getting into your network, tools can easily be found online to crack the code. WPA is the security setting recommended for home networks. All traffic is encrypted, and the network key/password you create will be very difficult to crack. Again, make this password as long as possible; a short phrase would be ideal. This password you will only need to enter once per computer, as it is saved.

These are only basic wireless configuration suggestions. There are many more steps that can be taken, both at an advanced level on the router (depending on hardware support) and at the computer level (anti-virus protections and firewalls) to ensure your network is secure. ABS Internet installs only the highest-quality equipment. Our expert technicians are able to quickly assess the needs of your home network, should you decide to contact us. Please visit our website at ABSInternet.com for more information.

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Summary of Network Hardware

Tuesday, October 13th, 2009

by Kevin Spark
 Most users connect seamlessly to the internet without realizing how the information gets to and from the internet. In reality, there are several different types of devices that allow you to surf the web. This article gives an overview of how it all connects together.

A Network Interface Card (NIC), also known as a network adapter, is the piece of hardware in your desktop or laptop computer that lets you send and receive information. Most network adapters come with wireless capability now, especially those in laptops. Every computer connected to a network must have a network adapter, and each adapter has a unique address built into the hardware, known as a MAC address.

Repeaters are devices that allow a signal to travel long distances. As cables travel these long distances, the signal tends to naturally degrade. A repeater receives the signal traveling down the cable and then retransmits it at a higher strength, allowing the signal to travel greater distance. Without repeaters, only those users within approximately 100 meters of the source of a signal would be able to send and receive data over the network.

A network hub is a fairly unsophisticated device that allows multiple connections to be linked together. A hub connects multiple ports together, allowing them to act as a single network segment. When data is received, the data is then broadcast to all of the hub’s ports, possibly resulting in “collision.” The availability of lower-priced switches and routers has rendered the use of hubs largely obsolete.

Network bridges are similar to hubs but are more complicated and efficient. Unlike a hub, which transmits traffic to all ports, bridges learn the identities of each connection and transmit data accordingly, rather than broadcasting traffic to all ports. Bridges come in three types: local bridges, remote bridges, and wireless bridges.

Switches are sometimes referred to as “intelligent bridges” because they perform largely the same function. However, switches have hardware that direct the data traffic, allowing them to “switch” from one port to another more quickly. In addition, switches usually have many more ports, with the intention that most network devices will be connected directly to the switch.

Routers are likely familiar to the average user. A router is a device that lets many users connect to the internet at once while it also creates an internal network, called a local access network (LAN). A router’s main function is to forward and route data. It operates on two planes: the “control plane” is for outgoing data, while the “forwarding plane” is for incoming data. Most commercial routers now have wireless capabilities.

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How It Works: Surfing the Web

Thursday, October 15th, 2009

by Kevin Spark
 Every day, millions of people around the world seamlessly visit website after website. But how does it work? This process, which seems simple and straightforward, actually requires a series of transactions.

1. What is the IP Address?
Before you can contact a website, you need to know its IP address. An IP address is like a phone number – it is a number that allows each computer connected to the internet to be uniquely identified. When you type “www.google.com,” your computer uses the domain name service (DNS) to find out the IP address of the Google website. DNS servers contain databases of all websites and their corresponding IP addresses. They are often run by Internet Service Providers (ISP), and are frequently updated. Once your computer has the IP address of the target website, it is ready to contact it.

2. Connect to the website.
Your computer initiates the connection to the website through a 3-step process. First, your computer sends a connection packet. A packet is a chunk of data that is specially formatted for whatever specific network task is being accomplished. When the website receives the “connect” packet, it responds with an “acknowledge” packet, telling your computer that it’s ready to connect. Your computer then responds with its own “acknowledge” packet, confirming that the connection has been formed. But how did your computer packets know how to get to the destination website?

3. Find a route to the website.
Once the packets have been stamped with an IP address (from the DNS server), they are sent to the closest network gateway, usually in the form of a router. If your computer is connected to a corporate intranet, there are often several routers that are functioning locally – none of them actually touch the internet. If you are using a wireless network at home, you likely have a wireless router. Once your computer sends the packet to this router, it is the router’s job to keep sending the packet up the chain. It sends the packet to your ISP. The ISP router checks to see if the website you are trying to contact is on its network. If not, it sends the packet to another router with broader coverage. Eventually, after traversing various networks, the packet reaches a router that serves the targeted website. That router sends your packet to the website, and a connection is formed.

4. Browse the website.
Now that the route has been discovered and a connection formed, your computer and the target website can communicate freely. The website sends the data for its home page, and your web browser then displays the page for you. When you click a link, your computer sends a request for the new page you want to see, and the website acknowledges the request and sends the new data.

Despite the fairly complicated process, all of this is usually done in just a few seconds, making it so convenient, you never have to think about it. Surf on!

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