Frequently Asked Questions

From time to time we get asked questions about the service and how it works. These are some of the most frequently asked questions we receive along with their respective answers. If there is something that you feel is missing from this FAQ, please contact an administrator at

General Questions

Home Users

ISPs and Web Hosts

General Questions

What is DNS?
DNS stands for the "Domain Name System." It is the protocol on the Internet that takes a name, such as "" and translates it into the IP address of the computer that actually holds the service you are trying to access. Since computers deal in numbers, and humans deal with easy to remember names, DNS is an essential building block on the Internet. Every domain name must have DNS entries in order to be used by the Internet at large.

What IS Dynamic DNS?
Dynamic DNS is simply a way of attaching a static hostname to a dynamic IP address. On the Internet, there are a limited number of IP addresses. When you connect to your ISP, you are assigned a temporary IP address that other computers use to find you while you are connected. Once you disconnect, that IP address is given to someone else, and so on. If you are trying to operate a gaming server, personal web server, or any other service that requires other computers to be able to find you, they need to know what your IP address is. This is not easy if your IP address is dynamic, like most people's are, because you will have to keep telling everyone what your current IP address is (comparable to changing your phone number every day).

With a dynamic DNS service, like DtDNS, you can get a static name to attach to that ever-changing IP address. Now, you just give out your static hostname instead of your IP address, and only tell the service what your IP address is. This way everyone will be able to find you quickly when you are online. For more information, see the Dynamic DNS Primer at Technopagan.

Is DtDNS secure?
Yes. We use SSL encryption throughout our web site to ensure a secure experience for our customers.

Can this technology be used on my full domain name?
Yes. DtDNS fully supports dynamic (and static) DNS services on full domain names in addition to our dynamic hostname services.

What DNS server are you running?
DtDNS is powered by the BIND DNS server, the de-facto standard for DNS resolution on the Internet.

What are some web/ftp/mail server software packages to get me started?
As with anything, you need the right tools for the right job. Internet technology is no different. Below is a list of some popular software packages* to get you started...

Web Servers - X5, Apache HTTPD, Microsoft IIS

FTP Servers - Serv-U, BulletProof FTP Server

E-Mail Servers - MDaemon, modusMail

Server Suites - InstantServers, LiteServe

* DtDNS is not affiliated with the authors of these packages, and does not endore or provide support for them. This list was compiled from personal experience and user suggestions.

Can I have more than one dynamic IP address within a full domain name?
Currently there is only one dynamic IP address variable available within a domain name. This variables can be used to update as many hosts within the domain you like. However, if you have two computers and would like some hosts to point to one computer, and the remaining hosts to point to the second computer, you will need to create a free hostname (, etc) and use CNAME records to alias it. Our support team will be more than happy to assist in this type of configuration. We are working on a better solution, but this workaround should work for most people in the mean time.

I downloaded DynSite to handle my automated updated, how do I configure it?
We have put together a tutorial to demonstrate the configuration of a hostname or domain name when using DynSite. This will give you a general idea of how to configure other clients as well.

My port 80 is blocked, how do I redirect my web site to another port?
Follow this procedure:

  • Create a new A Record called 'www2' and point it at ~ip~ in the Domain Manager.
  • Set the existing 'www' record to the iP address (offline).
  • In the Offline Handler, set to redirect to a URL and use

Once complete it may take ten to 15 minutes for the network to pick up the changes.

Some other port is blocked, how do I get around it.
You can't. Port 80 (standard http requests) can be redirected because of a feature of the HTTP protocol. Other ports (such as FTP and IRC) cannot be redirected by default. E-Mail can be redirected if you purchase e-mail routing or forwarding from a third party provider.

How do I delete my account?
Your account can be permenantly deleted on the Account Settings page. You can access this page from the left navigation bar once you're logged in. Deleting your account will permenantly remove all host names and domain names and you will forfeit any service credits. This cannot be undone.

Home Users

Can I run services on my personal cable or DSL line using DtDNS?
Yes and no. DtDNS is not concerned with the type of connection you are using to operate services, only the content. It is, however, against the acceptable use policies of many cable and DSL providers to operate such services on a personal connection. Check with your provider for their specific policies.

Can I run a warez server using a DtDNS hostname?
No. Our Terms of Service outline exactly what you can and cannot run in association with a DtDNS hostname. We will disable any account we find running such services without notice.

Can I run an adult web site using a domain hosted on DtDNS?
DtDNS does not have a problem hosting adult-related domain names, so long as all applicable laws are being followed regarding its operation.

When I'm in IRC chat, is there any way to make my DtDNS hostname appear instead of the ugly hostname that my ISP has assigned me (reverse lookups)?
No. DtDNS only provides forward host to address mappings. In order for DtDNS to provide reverse lookup capabilities, it would require a lot of work for your ISP. Even if they could do this for you, they wouldn't anyway.

What domain names are available for me to get a hostname on?
We have several domains available for hostnames. They are:


I am running behind a NAT router and my internal IP address is getting assigned to my hostname (or domain name), what am I doing wrong?
Since you are behind a NAT router, there are two things you need to do:

  1. Configure the update application you are using to NOT send an IP address with the update request. This will cause the update server to use the origin IP address assigned by your internet provider. If they are also having you go through a transparent proxy server, you can send the update on port 8080 instead of the standard 80 to get around this.
  2. Configure your NAT router to forward incoming connections to the correct internal IP addresses on the ports you would like to accept connections on (80, 21, etc).

How can I tell if my ISP is blocking my ports?
There is a free utility published by TZO that will help you figure this out. It is called PortDetective, and you can find it at

I have a Belkin router and a full domain name, but they require three-part domains?
Most Belkin routers now have support for the DtDNS update API. Their configuration is designed to handle our free hostnames which would require three parts (hostname, domain, tld), but most domains only contain two parts (domain, tld). To facilitate two part domain names in their update client, you may enter anything in the first part and the domain and tld in the other fields. This would mean that if your domain name is "" you would enter "anything" in the first field, "example" in the second field, then "com" in the third field. The update system will ignore the "anything" portion and update the domain name's base IP address.

ISPs and Web Hosts

Are the DNS servers separated from each other?
Yes. DtDNS maintains the primary server at the datacenter managed by Hostway in Tampa, FL. The secondary nameserver is currently located at SoftLayer Technologies in Seattle, WA. Our third DNS server is located at SoftLayer Technologies in Dallas, TX.

Does DtDNS offer bulk pricing for multiple domain names?
Yes. See our pricing page for more information.

Can I use DtDNS to manage all the domains for our customers?
Certainly! We have many customers who have placed all of their customer domains on our nameservers. This has helped them reduce their own bandwidth requirements, in addition to eliminating a single point of failure.

I want my own domain name to appear in the delegations. Can this be done?
Maybe. Most registrar will allow you to register your own DNS servers (using your own domain name) and specify our IP addresses as part of that registration process. The current IP addresses are always published on the support page, and we will send e-mail notifications to all domain users when any of these IP addresses is changed (which happens from time to time as we find better or more cost effective service providers). DtDNS no longer offers the "Custom Nameserver Branding" service with dedicated IP addresses at each of our locations as a result of this policy change at the registrars.

Can I host reverse DNS zones with you (e.g.
Yes, we do support reverse DNS domains. Simply create a new domain with the appropriate name (e.g. This will work for both a primary and a secondary domains. If this is a primary domain then you can create PTR records within the domain's Advanced Editor. Once you create the domains here you will need to work with your upstream provider to delegate your reverse DNS zone to our nameservers.

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