Now our web server appears to our external client to be located at IPex and on port Portex. To make the web service available on the internet we use a technique called port forwarding ( see the port forwarding and Internal vs external IP address tutorials for more details). However when making a service available on the Internet we will usually give it a static internal IP address. The Internal IP address is assigned to the internal server by the NAT router and via the DHCP service. The network diagram below shows the configuration

In the following discussion we are going to assume that we want to make a web server located on an internal server available on the internet.

Home networks typically uses a NAT router to connect to the internet which means that devices located on the internal network aren’t accessible from the Internet. Dynamic DNS (DDNS) -Setup and Useĭynamic DNS Services are used by small companies and individuals when they want to publish a service on the Internet, and that service is hosted within an internal or home network. In this tutorial we look at how dynamic DNS works and how to set it up on a home router. However small companies, and home networks don’t normally have their own DNS server so why would they need Dynamic DNS ? Dynamic DNS keeps DNS records automatically up to date when an IP address changes.ĭynamic DNS is used in large networks that host internal services, and use their own internal DNS and DHCP servers.

Setup no ip ddns on gdmss lite app