How do I know if ddclient is really working properly

[Barry Yu]

I installed ddclient, during level 3 starting up I could see "Starting 
ddclient ......... [O.K]"
When logged in as root in console, received a mail from ddclient said " 
Caught SIGTERM ;  exiting ". Is this a problem?
Logged into desktop all the way from the main menu->System 
setting->Server settings-> to Service configuration, can see that 
ddclient (pid2930) is running.
But the above "Caught SIGTERN" message seems to be a problem ( If it is 
how to fix?), and within this local machine what can I do to find out if 
ddclinet is really working properly? README is the only info I have, I 
setup according to it and the ddclient could read the IP address 
assigned from ISP to WAN port of my router, but this just doesn't give 
enough confidence to prove it is really working - I have to wait 5 days 
for IP address change  and then I can tell ( The last resort ).
Any pointer to solution will be appreciated.