Whenever i enable OpenVPN on a device, CG3000DCR drops internet and reboots. Tried putting the OpenVPN straight on the RT-AC66U but it did the same thing. I found this post that has the exact problem im having:
Hi ZaiLH. Constant reboots of the gateway indicates a problem with the equipment. The Business Service Center@ 1-800-391-3000 can schedule a tech call to diagnose the equipment and replace the gateway if necessary.