IP cams should have setup software with them. If you are using a cloud service it's pretty straight forward. If you are just using IP cams you'll need to VPN into the house or use port forwarding. Port forwarding is a bit tricky as you need a different iP and a different open port for every cam. Say the 10 octet is used in your home Cam 1 192.168.10.25:81 Cam 2 192.168.10.26:82 and so on. Use a good router like an ASUS 88 or above for port forwarding as you open the device up on that port for attack. You don't have to use the ports I used but make sure you don't create a conflict.