DDNS Service & Dynamic IP Addresses Used in Security Systems

  Many users of surveillance camera system want to view their CCTV cameras remotely over the Internet.  In order to do this, a high-speed Internet connection is needed. Usually, a static or dynamic IP address is assigned by Internet service provider (ISP).  What is the difference between dynamic and static IP address? So, I tell the difference between the two kinds of IP address. Set to an IP address which is unchanged for months or years at a time, this is a static IP address, set to an IP which is only good for a limited time, and which is changed according to the policy set by your ISP's DHCP server, this is a dynamic IP address

If you use a static IP address at your DVR location, you can connect to your security system remotely using the same IP address all the time. If you have a dynamic IP address, things changes because ISP assign IP address randomly.  If you want to track any changes to the dynamic IP, you need subscribe to a dynamic DNS service (DDNS) that keeps track of it for you.  The most popular DDNS service is dyndns.com for free.

When you register with a DDNS service, you can create a host name, you can use hostname to access a website on the Internet.  You then associate that host name with the IP address of your Internet service connection. We can use a router supporting DDNS to do this. Log into your router and locate the DDNS setup screen.  The location may vary by router manufacturer.  Enter your DDNS account settings, including your login, password, and the host name that you registered.  Now, anytime your router detects that your IP address has changed from your ISP, the router will notify the DDNS service about the new IP address.  This allows you to always use the hostname that you registered to connect to your DVR remotely over the Internet.  There is no need to remember or keep track of your IP address.