To prevent any possible water damage in the cameras, ensure the following:
1) Ensure that both the gray gasket and the white screw cap are in place and tightly assembled.
2) Add a “drip loop” as shown in the right photo, to avoid water following the cable directly into the gasket as shown in the left photo.
3) Check that the gasket forms a tight seal with the ethernet cable. An unusually thin cable may not seal well. In this case, wrap some electrical tape around the cable where the gasket grips it, or apply some silicone caulking around the cable exit.