Static IP for broadband - why and how19 July 2005
A static IP address (Internet protocol address) is a number that is assigned to a computer by an ISP (Internet service provider) to be its permanent address on the Internet. These addresses are very similar to telephone numbers and computers use IP addresses to locate and talk to each other over the Internet.
Unfortunately, there aren't enough IP addresses to go round so 'dynamic' IP addresses are used. These are non-assigned IP addresses that shift from user to user depending on who needs one at the time. To take the phone analogy, these are like public telephones - you use one when you need it and then someone else might use it later.
Using a dynamic IP address means your computer continually changes its 'location' on the Internet making it impossible for others to find you.
With a static IP address, a computer's location always remains the same and can be easily found by others, bringing real advantages.
The benefits
There are several applications that simply cannot be performed without the use of a static IP address. These include:
- Running a local email server for your inbound or outbound mail
- Running a local web server
- Running Virtual Private Networks (VPNs)
- Using video conferencing services
- Running other services or applications that require external access
- IP based security cameras or telematics
- Authentication for secure access to protected web sites
A further great benefit of static IPs is that you can contact and control your computer from anywhere in the world - keeping you in full control at all times.
As others can also control your computer, after authorisation is given, remote support is also a possibility as an off-site engineer will be able to access and fix your computer - a much cheaper option than on-site call out.
How many do you need?
Generally, if you are running one of any type of server (FTP, web, e-mail etc.) on-site then you only require a single static IP address and if you run one copy of any application which uses fixed port numbers you only need a single Static IP address.
If you connect multiple PCs or devices to the Internet they will usually need their own IP address and in these instances multiple IP addresses are recommended
How do I get a static IP?
To obtain your static IP address or addresses simply contact your ISP.
