If you're accessing the cameras from the same network (ie. your local network) then the IP and credentials are likely enough, but you'd need to refer to the documentation for your cameras to know for certain.
If you're attempting to access the cameras from the Internet then you'll need to make sure the IP is a non-private address, and that any devices sitting between the cameras and the Internet (external firewalls or NAT routers for example) are configured to allow traffic from the Internet to be passed on to the ports used by the cameras.
The specifics of configuring this will depend on:
- The specific network devices sitting between the cameras and the Internet.
- The specific model of camera will determine which ports or protocols need to be accessible.
Without this information it's not possible to give a more accurate answer.