DNS sometimes does not work ?

[RTKAT]

I leave my equipment on 24 hours and my IP address holds for a very long time. I have had the same IP address for as long as 13 month. It only changes when there has been a power outage for a long time. Sometimes, that even does not change it. I have had an account for years with a Dynamic Name Service and have some programs that use this service. It works just fine, no problems, well, almost.
This question is for the knowledgeable readers here that can explain why some programs just will not work with a DNS. They require you to have the IP address stored in their settings in number form. My security camera program is one of these. When the IP here does change, I have to reset the numbers and reset all the camera settings in my phone to view the cameras. Any ideas?

[mvallevand]

Is your problem really DNS? Most home networks don't have DNS running, except perhaps for DNS-like NETBIOS names used for for Windows networking. Sounds like what you want is to either assign your own static IP's to specific devices, or to configure your router's DHCP so that when it assigns a "fixed" private IP. Most routers allow you to do that based on the devices MAC address.

Martin

[RTKAT]

Well, not really. I'm not really sure on how to explain the problem in different form. Not really that important and I do have a way around the problem.
Thanks for a response.