Welcome to MyDNS.JP

MyDNS.JP is a Free Dynamic DNS(DDNS) that anyone can easily use. It can be used for various purposes such as Home Servers, Office Servers, WEBCAM and VPS.

Whether you use the Free Sub-Domain provided by MyDNS.JP, or Original domain that you already have. And IPv4 address(A) and the IPv6 address(AAAA) or both, And Hostname that use a Wildcard(*) or Anyname(tokyo, newyork, amsterdam), Or forward only emails to Google Works etc etc...

The basic usage fee for dynamic DNS is FREE!

Usage is very simple. You notifire IP Address to MyDNS.JP from such as a HomeServer, by POP3 and IMAP4, FTP, also using the DiCE such as HTTP-BASIC and, GnuDIP.

And, You can also set your IP address directly from the web page to check if the IP address notification is successful.

2025/07/11 00:15:02 UTC, Now active 32,433 users and 24,700 domains. IPv6 ready 7,133 domains! (27,790 domains are in DataBase)

What is Dynamic DNS?

How do your Machine actually access the server for the WEB and e-mail that you casually use?

For example, You will try to access the homepage https://www.MyDNS.JP/. Your machine makes a request to DNS. "Please tell me the IP address of www.mydns.jp."

DNS looks up the upper DNS from the domain. Eventually, you will find the primary name server for that domain... DNS replied. "That is 210.197.74.200."

Dynamic DNS can change this IP address at any time and immediately! But, Please be regularly notifie!

News & Topics

STEP.0 Introductions

You can notify the IP address in various ways. That is the feature of MyDNS.JP.

For example...

• You check mail every 10 min. (by POP3)
• Automatic upload webcam shot every 30 min. (by FTP)
• Access to login.html automatically every 30 min. (by HTTP-BASIC)

Let's JOIN US, And LOG IN. Do setting up Domain Info and notify your IP Address. For your Server!

CAUTION! Please be careful not to lose MasterID and Password!

STEP.1 Join Us

Please input your information.

• Name*
• Country* (Are you really from that country?)
• Address*
• Phone*
• Main Mail Address*

* Input Required.

STEP.2 Choose Domain

Please choose Free Sub Domain of MyDNS.JP, or input your Original Domain.

ex： tokyo.mydns.jp, newtork.server-on.net, madonna.live-on.net, etc ...

Do not forgot to set NS(Name Server) records at Registrar, if you want to use your Original Domain.

Child ID and DELEGATE

If you need separate other global IP address for sub domains, you add Child IDs after LOG IN.

ex： MasterID = tokyo.mydns.jp, ChildIDs = chiyoda.tokyo.mydns.jp, hachioji.tokyo.mydns.jp, miyake.tokyo.mydns.jp...

STEP.3 Set DNS Record

You have to set DNS Records.

• MX ... Mail Exchange, and Preference weight.
• A ... Hostname to IPv4 address.
• AAAA ... Hostname to IPv6 address.

SOA and NS, SPF records are automatic setup by MyDNS.JP.

STEP.4 Notify Your IP Address

You have to notify your IP Address.

You can notify the IP address in various ways. That is the feature of MyDNS.JP.

• POP3(s)
• IMAP4(s)
• FTP(s)
• HTTP(s)-BASIC
• HTTP(s)-DIRECT
• GnuDIP

If you have IPv4/v6 DUAL STACK line, you have to notify each IP address to ipv4.mydns.jp and ipv6.mydns.jp.

POP3(s),IMAP4(s)

You cannot actually send an email. Mail Check = IP address notification.

FTP(s)

You cannot actually FTP connect. Connection attempt = IP address notification.

HTTP(s)-BASIC

HTTP(s)-DIRECT

Both IPV4ADDR and IPV6ADDR, or either IPV4ADDR or IPV6ADDR.

ex: http(s)://www.mydns.jp/directip.html?MID=MasterID&PWD=Password&IPV4ADDR=xxx.xxx.xxx.xxx&IPV6ADDR=xxxx:xxxx:xxxx::xxxx

How to check IP address notification.

To check if your IP address has been notified correctly, set the default value (0.0.0.0 or 0:0:0:0:0:0:0:0:0) in IP ADDR DIRECT and then notify the IP address. If MyDNS.JP has properly received the notification, you should be able to check this in LOG INFO .

STEP.5 Ready DNS!

OK! Setting Completed.

You have to set a router (NAT, Port Forward), and filter, daemon on server.

MyDNS.JP will keep your DNS information between ONE WEEK sinse last IP address notify or last login. After over ONE WEEK, MyDNS.JP notify to you by Email and WEB.

If you will continue same state (=never notification or login) for over ONE MONTH or more, MyDNS.JP will delete your information from Database. Sorry. :-)

Caution! Dont Forget!

Please make sure your server will be sufficiently secure against Hacking or Attack, Virus

Good Luck!

Windows10 Mail

Easy to set up! :-)

STEP.1 Add Account

STEP.2 Select Internet Mail

STEP.3 Input MasterID, Password, Servers...

STEP.4 Click SIGN IN!

STEP.5 Change Account Setting

STEP.6 Change to Every 15 min.

Finish!

OK?

Linux crontab

STEP.1 Make Notification Shell Script.

STEP.2 Change mode and Execute!

Did you find "Login and IP address notify OK" or "login status=1"?!

STEP.3 Add setting to cron.

OK? :-)

1. USER

You apply to this service by the method that MyDNS.JP appoints to use MyDNS.JP. And it is necessary for you to be approved in MYDNS.JP.

2. FEES, PAYMENT

You have duty to pay enrollment fee and the annual convention costs that MyDNS.JP decided. MyDNS.JP does not give back enrollment fee others to you.

3. ID, PASSWORD

You have duty to manage MasterID and Password. And you must not sell or give MasterID and Password to another person. Even if you lose MasterID and Password by your mistake, so if you suffer a loss, MyDNS.JP do not guarantee it.

4. HOW TO USE

You have duty to obey a copyright and proprietary rights, and follow a rule of network service to use.

5. PROHIBITED ACT

You must not perform a prohibited act.

* Slander.

* a filth exhibition.

* Violation of laws and ordinances.

* attack act.

and the act that MyDNS.JP does not accept.

Adult contents is prohibited entirely.

SPAM is prohibited entirely.

Phishing Site is prohibited entirely.

6. ERASION OF THE REGISTRATION

When you infringe 5.PROHIBITED ACT, MyDNS.JP delete your information.

MyDNS.JP demand a damage amount of money from you. And you have duty to pay.

7. CANCELLATION OF THE REGISTRATION

MyDNS.JP keeps DNS information than the last notice for 1 week. MyDNS.JP delete your information from DATABASE, if MyDNS.JP cannot receive IP address from you more than 1 month.

When you resign immediately, send the email of the title "TAIKAI" by MasterID and a password.

8. MAINTENANCE

MyDNS.JP makes an effort to make the state of the system better. Therefore MyDNS.JP sometimes carry out maintenance and remodeling.

9. IMMUNITY FROM RESPONSIBILITY

MyDNS.JP does not guarantee for the loss that this service and this service influenced. But MyDNS.JP make an effort to continue service.

10. CHOICE OF LAW

This TERM shall be construed and controlled by the laws of Japan. Any dispute arising from the terms of this TERM or a breach of this TERM will be governed by the laws of Japan without regard to the conflicts of laws provisions thereof, and shall be brought in a court in Japan. MyDNS.JP may also cooperate with legal authorities and/or third parties in the investigation of any suspected criminal activity.

Regards.