Sopke to my ISP and he told me that the two addresses (?) or the two lots of numbers for DNS found in Network Connections - Status - Support are what they use (ie the numbers shown in my post of Feb 01 at 11:05 am). I do not know what to do in Zone Alarm (the free version) to do what you are suggesting.
From your screenshot, I see that you have ZoneAlarm. In my experience, ZA can often block certain IP's that you need to maintain an active connection with your ISP. The next time you're talking with your ISP, you should ask them for the range of DNS Servers that they use, and then add that range of IP's to your ZA's Trusted Zone.
The ISP tech reckons everyone on optusnet has this! After checking with his Super for some time he advised me that they would "check with some other customers to see if they were having problems with the 1 minute lease" and get back to me in a few hours - and that was about 6 or 7 hours ago! So am awaiting a call from India! (that's where the Optusnet techs hail from).
You should also ask your ISP why the lease time is so short... It's usually set at around 3 days... Not one minute.
He also put me through all the rigmarole I've done before trying to change the power management settings and of course, couldn't as I don't have the option. In response to your question, I am an administrator and can do all of the usual things as an administrator.
Is there any way of getting into the guts of the thing and changing this setting? The Optusnet guy said something about having to change the setting in the bios.
Thanks, Dan G