Laurante Cruz,
I noticed you also use Surveillance Client, yesterday when I lost connection to the NVR I tried to access it via CamView from outside the network and had no issues. Once I used SC (also from outside) it locked me out and it is not connecting at all from outside. However, I am still able to access the NVR via SC on the local network. Last Saturday I removed all the cameras and had them factory reset and reconfigure and readd to the NVR. I was thinking maybe it is the cable modem and ports redirecting since I can access the NVR locally. Let's try to get as many details as possible on our setups. Maybe we can figure something out. I am also using the GW switches, are you?