req.backend.is_shield
BOOL, read-only.
Available inall subroutines.
Indicates whether the backend is a Fastly Shield POP.
Shielding directs traffic from the Fastly POPs closest to the end user to the Fastly POP closest to your backend, and onward to your servers. It is therefore possible for a resource to be fetched from a backend that is another Fastly POP. When this is the case, req.backend.is_shield
will be true
and req.backend.is_origin
will be false
.
Conversely, if a request is being forwarded from Fastly to a server outside of the Fastly network, req.backend.is_shield
will be false
and req.backend.is_origin
will be true
.