please finish the "At the same time, to see more than 2 camera without any setting."
STEP1: Client side setting.
a. use RJ45 to connect router and PC. and then press 10.10.1.202 . and then go to LAN interface and add the default gate way 10.10.1.1
b. go to management ->video setting -> change the video port to 8199
STEP2: Router side setting
GO to firewall -> port filtering. And add the ip and port from client mode.
for example, 10.10.1.201 port 8197 to 8198
Connect the RJ45 to FEBON 220 'S WAN port