DD-WRT: How to update multiple host names registered at your DDNS service

Since DD-WRT v23-SP2, brainslayer, the creator/maintainer of DD-WRT, decided to replace ez-ipupdate with inadyn used for resolving WAN IP for DDNS reporting.

INADYN is a free DynDNS  client. It gives the possibility to have your own fixed hostname registered on the internet, although your IP might be changing. It checks periodically whether the IP address stored by the DNS server is the real current IP address of the machine that is running INADYN.

The following main advantages of inadyn are:

  • inadyn supports lot more DDNS providers.
  • It could be possible to let user choose protocol and enter custom server address via web interface so virtually all DDNS providers could be supported.
  • inadyn can update multiple accounts, not ez-ipupdate.

I am using dyndns.org since they offer several domains and an easy to use web interface. Since I have several dynamic domains in dyndns, why not take advantage of this new DDNS capability.

If you have multiple host names registered at your DDNS service, you can enter them in the “Host Name” field using the “-a” option.

For example:

You have the following domains and want to automatically update their IP address to point to your router:

you can do it by entering in the “Host Name” field the following format:

myhostname1.example.org -a myhostname2.example.org -a myhostname3.example.org

**Note: no “-a” for the first host name.)

DynDNS multiple domains

After selecting Save or click Apply Settings for the new update to take effect, you should see the successful update in the DDNS Status.

If you get the following error:

Error validating DYNDNS svr answer. Check usr,pass,hostname!

make sure you are using the correct username and password provided by your DDNS service provider and the hostname should by FQDN myhostname1.example.org instead of just myhostname1.


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