IP blacklist and trunk allow-list
Manual IP blocking plus an opt-in default-deny allow-list that restricts inbound trunk traffic to your carriers' IPs.
Skeleton — this outline is the writing plan; content lands in the docs phase.
Manual IP blocking plus an opt-in default-deny allow-list that restricts inbound trunk traffic to your carriers' IPs.
Skeleton — this outline is the writing plan; content lands in the docs phase.