I've also noticed another anomaly.
I recently switched to Verizon from Comcast, and began using their
border device:
Three times I've noticed that when I'm using their FiOS Quantum Gateway
- model G1100, that port forwardings for ICMP-Echo-Request and IPENCAP
have disappeared from my forwarding table.
I cannot be certain why; but I will be removing their device from my
border later today. It should also be noted that Verizon has access to
their border devices; so I'll be rectifying that today.
- Lynwood