"Protecting data carrying ports (such as modems) is very complex."
My choice was to connect the VDSL modem to the switch using a media converter and a fibre cable. In case a lightning strikes the telephone line, it can't get past the media converter, and damage more expensive equipment.
I've seen protections for VDSL lines, it's not clear how good they are at keeping the line performance.
Of course switching to FTTH greatly increase the protection.
Biting the hand that feeds IT
