Hikvision ip can ports?

igave 4 x 2cd2332 cameras connected to a Poe switch then a hybrid dvr.
Everything appears to work fine but just tried using the hik connect app and i can add all the camera but only one is viewable. I can view them all on ivms-4200 app.
They have all different ip addresses but have all the same http, rtsp, https and server ports.
Do these all need to be different ?
 
I'm not savvy on NVRs enough to help you then. Have you tried adding the NVR to the mobile app just to see if it works?
 
Nvr must be connected to Internet and you have to enable ezvid under platform access tab for unit to be online for hik-connect.