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Static vs Dynamic

Definitions

As the name implies Static IP addresses are the same every time you connect. Dynamic IP addresses may change each time you connect to the network (e.g. Internet). 

When you need Static IP Addresses

You need one or more Static IP addresses if any of the following are true:

  1. You run one or more Web server's directly on your site that require external access (from the Internet, or Extranet but not typically an Intranet) . 
  2. You run one or more E-mail server's directly on your site that require external access (from the Internet, or Extranet but not typically an Intranet) . 
  3. You run one or more FTP server's directly on your site that require external access (from the Internet, or Extranet but not typically an Intranet) .
  4. You run any other service or 'Application' that requires external access (from the Internet or an Extranet). Some Financial Terminal Client applications require that you have a static IP address for licensing purposes. 
  5. You allow 'incoming' Video Conferencing you may need to use static IP addresses. 

How many IP Addresses do you need

The following 'rules of thumb' apply to calculate the number of required IP addresses.

  1. If you run one of any type of server (FTP, Web, E-mail etc.) on site then you only require a single Static IP address. This is because routers allow 'port mapping' for just this situation.
  2. If you run one copy of any application which uses Fixed Port Numbers you only need a single Static IP address.
  3. In all other cases you need as many Static IP addresses as there are Applications or Servers that use the same Port Number.

If you have any doubts discuss then with one of our technical specialists.