Network


How to Find Your iPhone's MAC Address

  Matt Cone       March 25, 2013

Your iPhone’s Wi-Fi interface has a permanent, unique serial number called a media access control (MAC) address. Some universities and employers may request your iPhone’s MAC address to monitor or limit your access to certain Wi-Fi networks. MAC addresses can also be used for less nefarious purposes. For example, if your iPhone is stolen on a university’s campus, the IT department may be able to use its MAC address to trigger an alert when the criminal connects your iPhone to a university network.

Setting DHCP Reservations on Your AirPort

  Matt Cone       March 22, 2013

In a previous tutorial, you learned how to set a static IP address in Mac OS X to create a permanent, private IP address for your Mac that doesn’t change from one day to the next. But if you own an AirPort Extreme, AirPort Express, or Time Capsule base station, you can use something called DHCP reservations to do essentially the same thing. What’s the difference between a static IP address and a DHCP reservation?

How to Find Your Mac's MAC Address

  Matt Cone       March 21, 2013

Each of your Mac’s network interfaces — such as the ethernet and Wi-Fi cards — have a permanent, unique serial number called a media access control (MAC) address. Some universities and employers may request your Mac’s MAC addresses to monitor or limit your access to certain networks. MAC addresses can also be used for less nefarious purposes. For example, if your computer is stolen on a university’s campus, the IT department may be able to use its MAC address to trigger an alert when the criminal connects your computer to a university network.

How to Set a Static IP Address in Mac OS X

  Matt Cone       March 15, 2013

When your Mac is connected to a private network in a home or office, it’s probably assigned what’s known as a dynamic IP address. (To check, see How to Find Your Mac’s IP Address.) That’s not a problem for the majority of users - most people don’t care whether their IP addresses changes or not. But dynamic IP addresses won’t work for certain tasks like port forwarding, dynamic DNS, or client-to-client file sharing on the local network.

How to Configure Network Locations in OS X

  Matt Cone       March 14, 2013

Your Mac allows you to save and quickly switch between multiple network configurations, which are referred to as network locations in OS X. This is a useful feature for users who need to set network-specific proxies, DNS servers, or static IP addresses. You can also use network locations to specify settings for specific network interfaces, such as an Ethernet card, Wi-Fi or Bluetooth connection, and even VPN. Once you’ve created and saved different network locations, you can switch between them by using the Apple menu or System Preferences.

Creating a Dedicated 5GHz AirPort Network

  Matt Cone       March 13, 2013

AirPort base stations released after 2009 are capable of operating over both 2.4GHz and 5GHz bands simultaneously. That means that when you connect a Mac, iPhone, or iPad to an AirPort’s wireless network, it will automatically select and use one of the bands for the best speed, consistency, and range. That should be fine under normal circumstances. The choice is made for you automatically, and you’ll probably never notice the difference.

How to Find Your Mac's IP Address

  Matt Cone       March 11, 2013

Your Mac is assigned something called an IP address when it connects to a network. Other devices that are connected to the same network can use this unique identifier to transfer information to and from your Mac. If this sounds confusing, it might help to think of an IP address as your Mac’s home mailing address. Just like physical mail, which is routed to your home via a unique address, digital information is routed to your Mac using an IP address.

How to Password Protect an AirPort's Settings

  Matt Cone       February 27, 2013

Whether you operate a guest network on your AirPort or simply use it to provide wireless access to the people in your home or workplace, you should ensure that your AirPort base station’s settings are protected with a strong password. Doing so will prevent users connected to the AirPort network from modifying the base station’s settings with the AirPort Utility application. The base station’s password is usually specified when setting up the AirPort, but it can be changed at any time.

How to Create a Guest Network with an AirPort

  Matt Cone       February 20, 2013

Did you know that your AirPort base station is capable of creating two separate wi-fi networks? By enabling the guest network feature, you can create a second network specifically for guests or - since guest wi-fi networks can be open or protected with a password - authorized users. Creating a guest wi-fi network with your AirPort is easy and takes only a few minutes. This tutorial shows you how to do it.

Make Your iPad Ask to Join Wi-Fi Networks

  Matt Cone       February 19, 2013

By default, your iPad automatically connects to known wi-fi networks. (To stop an iPad from automatically connecting, you can tell your iPad to forget a wi-fi network.) But what happens if you take your iPad to a new location? You’ll need to manually connect your iPad to a wi-fi network. That’s a hassle. But if you have the foresight and inclination, you can save yourself time in the future by making your iPad ask to join wi-fi networks when no known networks are available.



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