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New Member

DDNS not working


My wan link is a ADSL line with a dynamic ip. I am trying to set up from the router my dns using a dynamic dns. In this case I use

This is my configuration:

ip ddns update method myddns


add <A HREF="javascript:newWin('')"></A>=<h>&myip=<a>

interval maximum 0 0 2 0

interface Dialer0

ip ddns update hostname

ip ddns update myddns host

ip address negotiated

Aparently should be working like that.

This is the output of show ip ddns update

XXXX#show ip ddns update

Dynamic DNS Update on Dialer0:

Update Method Name Update Destination

myddns host:

But it is not working. Even with the debug ip ddns update nothing happens, I can not see any packet or communication between my router and dns server.

Can anyone help me?

Thanks in advance,


New Member

Re: DDNS not working

Hi Jorge,

I believe you have this line wrong:

"ip ddns update myddns host"

Try instead:

"ip ddns update myddns"

The 'host xxxxxx' part is not for HTTP ddns methods.

Also be carefull with this line:

"interval maximum 0 0 2 0"

It will configure the router to perform the update every 2 minutes, and that will block your service due to abuse.



New Member

Re: DDNS not working

Hi Rui,

I had already tried without the host XXXX as well but didnt work either.

Regarding the 0 0 2 0, I use this values just to troubleshoot it, as if it is sending updates every 2 minutes, I could see something in the debug output, but nothing happens.

Does not even try to send the update!!!

Thanks anyway,


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