ZoneEdit DDNS diagnostic

[gatorback]

BACKGROUND About 8 years ago, I had setup ZoneEdit to provide DDNS for a .com and .us domain in the same account. DDNS was working well for both until a few months ago. The .us domain continues to work, however, the problem is with the .com domain. Now that I have a little time, I would like to understand what the issue. Excerpt from tail /tmp/syslog.log:

1. Sep 2 09:04:48 ddns update: asusddns_update: 1
2. Sep 2 09:05:14 watchdog: start ddns.
3. Sep 2 09:05:14 rc_service: watchdog 481:notify_rc start_ddns
4. Sep 2 09:05:14 ddns update: ez-ipupdate: starting...
5. Sep 2 09:05:14 ddns update: connected to dynamic.zoneedit.com (64.68.198.48) on port 80.
6. Sep 2 09:05:19 ddns update: error processing request
7. Sep 2 09:05:19 ddns update: server output: HTTP/1.1 200 OK^M Date: Wed, 02 Sep 2015 13:05:15 GMT^M Server: Apache/2.2.22 (Debian)^M X-Powered-By: PHP/5.4.35-0+deb7u2^M Set-Cookie: easydns_language=en_US; expires=Thu, 01-Sep-2016 13:05:15 GMT; path=/^M Set-Cookie: PHPSESSID=ohpbriu78vvb2dn9nu1q0u0cr3; path=/^M Expires: Thu, 19 Nov 1981 08:52:00 GMT^M Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0^M Pragma: no-cache^M Vary: Accept-Encoding^M Content-Length: 98^M Connection: close^M Con

OBSERVATIONS
I have intentionally set the .com DNS entry to 8.8.8.8 in zoneedit, with the goal to have the DDNS client to update to the WAN (Internet) IP address. I was unable to find any differences in the settings of the .com and .us settings, that could cause the error. I updated my router to the latest firmware, and attempted to use the token authentication and account password authentication.

Line 5 and 7 of the log entry indicates that communication is occurring between the router and ZoneEdit.


QUESTIONS
How can the Error in Line 6 of the log be used to diagnose the problem?
Is there a terminal command that can dump useful diagnostic data that could be posted (pastebin)?

I have command line access (SSH) to the DDNS client.

Thank you for actionable suggestions / diagnostic questions

 

[L&LD]

Please don't use bold for all your text.

 

[Calisro]

What does this return?

wget -O - --http-user=username --http-passwd=password 'http://dynamic.zoneedit.com/auth/dynamic.html?host=www.mydomain.com'