IMO, Dahua made a mistake in deciding to default their cameras to one static address. It makes it very nearly impossible to install a bunch of new cameras, bring them all online at the same time, and then configure them with production IP settings. They have to be brought onto a network one at a time.
Pelco, for instance, defaults their cameras to DHCP, and if they can't find a server they eventually timeout to one default static address. This is a better and more versatile system.
Earlier in this thread someone mentioned a software that finds Dahua cameras on the network. I know of software like that for Pelco and Hikvision. Can someone point me to it for Dahua?