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Google Cloud NAT internal IP
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I have a running cluster on Kubernetes with GCP, and some services running on App Engines, and I'm trying to communicate between them without being able to access the App Engines from the outside.
I created a private Kubernetes cluster with a specific subnetwork, I linked this subnetwork to a Cloud NAT to have a unique egress IP I can whitelist, and I allowed this IP in the App Engine firewall rules.
However, when I request my app engines from the cluster, I get a 403 response because it doesn't pass through the firewall. But if I connect to my Kubernetes pod and try to request a site to know my IP, I get the IP I set in the Cloud NAT.
I found in the Cloud NAT documentation that the translation to internal IPs is realised before the application of the firewall rules (https://cloud.google.com/nat/docs/overview#firewall_rules).
When I connect to the app engines, I can see that requests that are made through the NAT gateway come in with IP 0.0.0.0. However, when we whitelist only this ip, the requests goest through only 1 out of 3 times, which seems really weird.
Would you know how to understand and fix this?
firewall nat
google-cloud-platform asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
add a comment |
I have a running cluster on Kubernetes with GCP, and some services running on App Engines, and I'm trying to communicate between them without being able to access the App Engines from the outside.
I created a private Kubernetes cluster with a specific subnetwork, I linked this subnetwork to a Cloud NAT to have a unique egress IP I can whitelist, and I allowed this IP in the App Engine firewall rules.
However, when I request my app engines from the cluster, I get a 403 response because it doesn't pass through the firewall. But if I connect to my Kubernetes pod and try to request a site to know my IP, I get the IP I set in the Cloud NAT.
I found in the Cloud NAT documentation that the translation to internal IPs is realised before the application of the firewall rules (https://cloud.google.com/nat/docs/overview#firewall_rules).
When I connect to the app engines, I can see that requests that are made through the NAT gateway come in with IP 0.0.0.0. However, when we whitelist only this ip, the requests goest through only 1 out of 3 times, which seems really weird.
Would you know how to understand and fix this?
firewall nat
google-cloud-platform asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
add a comment |
I have a running cluster on Kubernetes with GCP, and some services running on App Engines, and I'm trying to communicate between them without being able to access the App Engines from the outside.
I created a private Kubernetes cluster with a specific subnetwork, I linked this subnetwork to a Cloud NAT to have a unique egress IP I can whitelist, and I allowed this IP in the App Engine firewall rules.
However, when I request my app engines from the cluster, I get a 403 response because it doesn't pass through the firewall. But if I connect to my Kubernetes pod and try to request a site to know my IP, I get the IP I set in the Cloud NAT.
I found in the Cloud NAT documentation that the translation to internal IPs is realised before the application of the firewall rules (https://cloud.google.com/nat/docs/overview#firewall_rules).
When I connect to the app engines, I can see that requests that are made through the NAT gateway come in with IP 0.0.0.0. However, when we whitelist only this ip, the requests goest through only 1 out of 3 times, which seems really weird.
Would you know how to understand and fix this?
firewall nat
google-cloud-platform asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
I have a running cluster on Kubernetes with GCP, and some services running on App Engines, and I'm trying to communicate between them without being able to access the App Engines from the outside.
I created a private Kubernetes cluster with a specific subnetwork, I linked this subnetwork to a Cloud NAT to have a unique egress IP I can whitelist, and I allowed this IP in the App Engine firewall rules.
However, when I request my app engines from the cluster, I get a 403 response because it doesn't pass through the firewall. But if I connect to my Kubernetes pod and try to request a site to know my IP, I get the IP I set in the Cloud NAT.
I found in the Cloud NAT documentation that the translation to internal IPs is realised before the application of the firewall rules (https://cloud.google.com/nat/docs/overview#firewall_rules).
When I connect to the app engines, I can see that requests that are made through the NAT gateway come in with IP 0.0.0.0. However, when we whitelist only this ip, the requests goest through only 1 out of 3 times, which seems really weird.
Would you know how to understand and fix this?
firewall nat
google-cloud-platform firewall nat
google-cloud-platform asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
asked Feb 12 at 9:30
Antoine DussarpsAntoine Dussarps
11
11
add a comment |
add a comment |
1 Answer
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As per the documentation you mentioned, when Cloud NAT is configured it automatically enables Private Google Access for that subnet. However, while Private Google Access permits access to Cloud and Developer APIs and most GCP services there are some exceptions and seems that App Engine is not supported.
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
add a comment |
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As per the documentation you mentioned, when Cloud NAT is configured it automatically enables Private Google Access for that subnet. However, while Private Google Access permits access to Cloud and Developer APIs and most GCP services there are some exceptions and seems that App Engine is not supported.
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
add a comment |
As per the documentation you mentioned, when Cloud NAT is configured it automatically enables Private Google Access for that subnet. However, while Private Google Access permits access to Cloud and Developer APIs and most GCP services there are some exceptions and seems that App Engine is not supported.
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
add a comment |
As per the documentation you mentioned, when Cloud NAT is configured it automatically enables Private Google Access for that subnet. However, while Private Google Access permits access to Cloud and Developer APIs and most GCP services there are some exceptions and seems that App Engine is not supported.
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
As per the documentation you mentioned, when Cloud NAT is configured it automatically enables Private Google Access for that subnet. However, while Private Google Access permits access to Cloud and Developer APIs and most GCP services there are some exceptions and seems that App Engine is not supported.
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
answered Apr 3 at 16:42
Raul BautistaRaul Bautista
733
733
add a comment |
add a comment |
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