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Dynamic DNS on Dialer0

I have a 2651XM running IOS 12.4(9)T working as a firewall. I'd like to make it automatically update its DDNS hostname. I have configured the following:

ip ddns update method sdm_ddns1

HTTP

add <A HREF="javascript:newWin('http://username:password@members.dyndns.org/nic/updatesystem=dyndns&hostname')">http://username:password@members.dyndns.org/nic/updatesystem=dyndns&hostname</A>=<h>&myip=<a>

remove <A HREF="javascript:newWin('http://username:password@members.dyndns.org/nic/updatesystem=dyndns&hostname')">http://username:password@members.dyndns.org/nic/updatesystem=dyndns&hostname</A>=<h>&myip=<a>

interval maximum 0 0 5 0

ip ddns update hostname myhostname.homeip.net

ip ddns update sdm_ddns1 host members.dyndns.org

...but for some reason it's not working. I've tried replacing the variables with real data and plugging the URL's above into the browser and it worked. I turned DDNS update debugging on but I'm not seeing any events regarding it. No packets to/from members.dyndns.org are being dropped by the firewall either. What am I doing wrong?

Thans in advance!

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Re: Dynamic DNS on Dialer0

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