Dynamic DNS (DDNS) Explained

Dynamic DNS (DDNS) allows you to access devices or services on your home network using a fixed name (such as myhome.ddns.net), even though your broadband IP address may change over time.

This can be useful for customers who need remote access to certain devices or services.

Why Your IP Address Changes

Vfast broadband services use dynamic IP addresses.

This means your public IP address can change occasionally, for example:

• When your router reconnects
  
• After network maintenance
  
• As part of normal network management

For everyday internet use, this makes no difference.

However, if you remotely access devices inside your network, a changing IP can be inconvenient.

What Dynamic DNS Does

Dynamic DNS works by:

• Giving you a fixed hostname (for example: myhome.ddns.net)
  
• Automatically updating that hostname whenever your IP address changes
  
• Letting you connect using the hostname instead of an IP address

Your devices always point to the correct address, even if it changes.

When You Might Need Dynamic DNS

DDNS can be helpful if you use:

• Remote access to a NAS or file server
  
• Home CCTV or smart cameras
  
• Remote desktop access to a home PC
  
• Certain home automation or monitoring systems

Most customers do not need DDNS unless they actively use remote access features.

Does DDNS Work With Vfast Services?

Yes, but how it works depends on your connection type.

IPv6 Connections

• Many DDNS providers support IPv6
  
• IPv6 allows direct addressing without shared IP limitations
  
• This is the most reliable option where supported

IPv4 Connections

• DDNS works on standard dynamic IPv4 connections
  
• Some services using shared IPv4 (CGNAT) may limit inbound connections
  
• If a service does not work as expected, our Service Desk team can advise

Do You Provide a DDNS Service?

No.

Vfast does not provide a built-in DDNS service.

However our routers typically support third-party DDNS providers, such as:

• TP-Link
• No-IP
  
• DynDNS

You create an account with the provider and configure it in your router settings.

Router Compatibility

To use DDNS, your router must:

• Support Dynamic DNS configuration
  
• Be compatible with your chosen DDNS provider

If you are using your own router, check the manufacturer’s documentation.

If you are using a Vfast-supplied router, our Service Desk team can confirm whether DDNS is supported and where to configure it.

Things to Consider Before Using DDNS

DDNS does not replace proper security

Devices exposed to the internet should always use:

• Strong passwords
• Updated firmware
• Secure protocols where available

If you are unsure whether DDNS is appropriate for your setup, contact our Service Desk before making changes.

Summary

• Dynamic DNS provides a fixed name for connections where IPs change
  
• It is useful for remote access, not everyday internet use
  
• Works best with IPv6-enabled services
  
• Requires router support and a third-party DDNS provider
  
• Our support team can help if you experience compatibility issues

Related Articles

• IP Addresses, Static IPs & Advanced Connectivity