network ip address change at random?

Microsoft Windows xp professional editio...
October 5, 2009 at 08:45:29
Specs: Windows XP
I have a security system and a web server set up on a network with about 5 computers. Recently I suddenly wasn't able to connect to my DVR software for remote viewing.

I have port forwarding set up on the router so that it connects to one for the DVR and another for the web server.

I discovered that the problem occurred because the network IP on the DVR computer had been changed from to

Could this mean that someone has discovered the password to my router?? Or could it be something more serious than that?

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October 5, 2009 at 08:57:52
Nothing more serious than your router re-releasing IP addresses. Some routers will do this as a matter of routine every 24 hours or so unless you tell it otherwise. In normal circumstances it is not a problem until you start hosting a server.

Two ways round to the problem. Look into the routers configuration and look for an option to reserve a particular IP address for a particular computer. This is normally done during port forwarding.

If this facility isn't available allocate a static IP address to the server from outside of the DHCP scope and forward to that address.


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October 5, 2009 at 09:06:57

The odd thing though is the fact that it hasn't done this in the 8 months that I've been running the servers. This is the first time.

I'll follow your instructions though and see if that will keep it from doing it again.

Thank you very much.

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October 5, 2009 at 13:14:29
I would recommend going with a static IP address no matter what.

For any network appliance, be it a switch, router, server or even a security camera you should always use static IP's.

Assign one to this server that's outside the DHCP scope and you should be fine and never have this particular issue again.

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