Every origin has a policy for edges run by other operators. It matters because:
- traffic that enters at someone else's edge still leaves from your origin's IP address;
- more linked edges mean more routes to your origin, and more traffic.
Open (default)
Any operator can link an edge to this origin without asking.
Whitelist
Only operators whose account IDs you add can link. Each operator's account ID is shown, with a copy button, at the top of their operator dashboard; ask for it and add it under Settings → Foreign Edge Access.
Closed
Only your own edges can link.
Where to set it
With the Open / Whitelist / Closed buttons on an origin, or under its Settings → Foreign Edge Access, where the whitelist is edited. Your own edges can always link, whatever the policy.
The policy is checked only when a link is created. Tightening it does not remove links that already exist; remove those under Edge ↔ Origin Links.