We've noticed a growing issue with some of our 6300-CX units that are connecting with Verizon SIM cards with static APNs (e.g. we01.vzwstatic, so01.vzwstatic, etc.).  The problem is when bots or people on the internet try to attack the 6300-CX's passthrough IP, the 6300-CX is rejecting the attacks, which is good, but it's reject them with the wrong IP address, which Verizon doesn't like so they kill our cellular connection.  The result is the 6300-CX's cellular connection will be bouncing up and down (evident by the fact that the LED on the 6300-CX goes from solid blue to flashing white, then solid blue for a few minutes and back to flashing white, rinse, repeat).

Firmware versions 17.2.22.5 or higher resolves the connectivity issues on the Verizon static APNs.  You can use the following instructions to upgrade a 6300-CX or 6300-LX to the new 17.2.22.5 firmware:

https://accelerated.com/support/6300_CX/users_guide_web/#par-21