google compute engine - How to allow HTTP requests from forwarding rule only -


i setting http load balancer compute engine instances. after basic setup works, want block external http access compute engine instances. http communication should go through forwarding rule. how configure network firewall achieve that?

so far network firewall looks like:

default-allow-http

allow source (0.0.0.0/0)

tcp:80 ; tcp:443

i tried change source filter 10.240.0.1/16 or forwarding rule ip (107.178.254.89). none of these works.


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