Custom DNS Record Includes Port Number: A Solution for IoT Server Multiples Services

Custom DNS Record Includes Port Number: Solution for IoT Server Multiple Services

In the Internet of Things (IoT) world, it is common for servers to offer multiple services on different ports. For example, a server might have two services running on IP address 192.168.1.4, one on port 5858 and another on port 7854. However, when creating DNS records, it is not possible to specify a port number. This article will explore a solution to this problem using custom DNS records and OpenWRT, a popular router firmware.

Key Concepts

To understand the solution, it is important to first understand some key concepts:

• DNS: The Domain Name System (DNS) is a hierarchical and decentralized naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities.
• Ports: A port is a communication endpoint in a computer system. It is identified by a number from 0 to 65535.
• OpenWRT: OpenWRT is an open-source router firmware that can be installed on a wide variety of router models. It offers many advanced features, including the ability to create custom DNS records.

The Problem

When creating DNS records, it is not possible to specify a port number. This means that it is not possible to create a DNS record for the service running on 192.168.1.4:5858 and another one for the service running on 192.168.1.4:7854. This can be a problem for IoT servers that offer multiple services on different ports.

The Solution

One solution to this problem is to use custom DNS records and OpenWRT. With OpenWRT, it is possible to create custom DNS records that include the port number. For example, it is possible to create a DNS record for service1.example.com that points to 192.168.1.4:5858 and another one for service2.example.com that points to 192.168.1.4:7854.

Applications

This solution can be used in any situation where it is necessary to access multiple services on an IoT server that are offered on different ports. For example, it can be used to access a web interface for one service and a data interface for another service.

Significance

This solution is significant because it makes it possible to access multiple services on an IoT server using human-readable domain names instead of IP addresses and port numbers. This can make it easier to manage and maintain IoT systems.

Creating Custom DNS Records with OpenWRT

To create custom DNS records with OpenWRT, follow these steps:

1. Install OpenWRT on your router.
2. Connect to your router's web interface.
3. Go to the System > Services > DNS page.
4. Enable the Custom DNS option.
5. Add a new custom DNS record with the desired domain name and IP address and port number.

Example

For example, to create a custom DNS record for a service running on 192.168.1.4:5858, follow these steps:

1. Connect to your router's web interface.
2. Go to the System > Services > DNS page.
3. Enable the Custom DNS option.
4. Click the Add button.
5. In the Hostname field, enter the desired domain name (e.g. service1.example.com).
6. In the IP Address field, enter the IP address of the server (e.g. 192.168.1.4).
7. In the Port field, enter the port number (e.g. 5858).
8. Click the Save & Apply button.

In this article, we have explored a solution for the problem of accessing multiple services on an IoT server that are offered on different ports using custom DNS records and OpenWRT. We have covered the key concepts, applications, and significance of this solution, as well as providing step-by-step instructions for creating custom DNS records with OpenWRT.

References

• OpenWRT
• DNS - Wikipedia
• Port (computer networking) - Wikipedia