Only allow Google Load Balancer traffic (Firewall Rules)

Posted on February 18, 2019 at 6:19 pm

For security reasons you should only allow incoming traffic from Google Load Balancer on your backend instances. To do so, when making a GCE firewall rule, just set the Source IP ranges to these GCE IPv4 ranges:

Read more here:

Google Cloud Load Balancer Firewall Rules
Tuning NGINX behind Google Cloud Platform HTTP(S) Load Balancer

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