I seem to be having the same problem you guys had. I am trying to view my system remotely. I too have a clover 4570 model. I have no problem accessing the cameras within the local network (so long as i use the local IP address, 192.168.0.150 i believe it is). However, when i try to access the cameras from any other computer outside the network, i get the classic, "DVR not found !" message. So far i think i have tried a million combinations. To make things as simple as possible, i am not using a DDNS account, yet, and i enabled the system in my router configuration as DMZ. Nonetheless, i have port forwarding, AND virtual server settings configured for the system. I cannot figure out how to access my settings for my sprint dsl modem. The default gateway on my router says 192.168.1.33, which, in my previous experiences means this is the address for the dsl modem itself. However, when i try to access it, iexplorer cannot find the page. Given everything I have done so far, i tend to think it is my dsl modem that is "blocking" a port, or as one of you guys said, "acting as a router." It's a sprint 935 series modem. Any clues on how i can access my dsl modem settings?
p.s., not sure if this is totally relevant, but i was able to successfully ping that ip address where the system is set up.