Here's how to make a simple and inexpensive outdoor mount for the Foscam R2 or similarly shaped cameras. It's super-durable, water-tight (if done properly), and weather-resistant.
1) Buy a 3" diameter ABS cleanout adapter fitting (about $3).
2) Drill a hole in the center of the cleanout plug's cap; this is where you'll use a 2.5" 1/4 28 screw to attach the camera. Make sure this hole is centered or the camera housing will bind and won't be able to rotate.
3) Mark and cut the threaded cap to allow the Ethernet connector and power cord access to the back of the camera. You'll also need to make a small cutout to allow the wifi antenna connector to sit flush in the cap.
4) Mark and cut corresponding holes in the body of the cleanout adapter to match up with the holes in step 3. You'll want to attach the camera and then assemble the plug, screwing it in so it's snug and flush with the top of the adapter body. Make a mark across the top of the plug and body so you can easily return it to the same exact position.
5) Make sure you create a small relief cutout at the top of the Ethernet access hole, or you'll have a hell of a time unplugging the connector and getting it out. Ask me how I know.
6) Attach the camera, then screw the plug into the adapter body so the cutouts and holes align. Insert the Ethernet plug and the power plug.
7) If you've done this right there should be about 1/8th" inch clearance all around the camera, allowing it to rotate freely.
8) Unscrew the camera (or mask it off) and paint the cleanout adapter. I use Plasti-Dip instead of paint but either will work fine.
8) Fab up a simple bracket and attach it to the same screw you used to attach the camera to the threaded plug. Or, use a clamp/band to attach it to the mounting location of your choice.
9) Fill the Ethernet and power supply holes with silicone rubber to prevent water and insects from getting in.
I used this POE-to-5VDC adapter to power the camera from my Ethernet cable so I didn't have to run a separate 5VDC power cord to it:
https://www.amazon.com/gp/product/B01DOSOCEE/
(Additional images in the next post; apparently I can only attach 3 per post)