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Tejas Jain - GCP Constraints & Random Facts


Google Cloud Interconnect Security

Cloud Interconnect does not encrypt the connection between your on-premises network and Google's network.

Cloud VPN cannot be used with Dedicated Interconnect

For additional security, use application-level encryption or your own VPN


While using Cloud CDN, the default time-to-live (TTL) for content caching is 3600 seconds = 60 mins


Cloud NAT sends only the translation logs and error logs to Cloud Logging service.


GCP Dedicated Interconnect - On Premises network device requirements:

    10-Gbps circuits, single mode fiber or 100-Gbps circuits, single mode fiber

    IPv4 link local addressing

    LACP, even if you are using single circuit

    EBGP-4 with multi-hop

    802.1Q VLANs


While using Cloud VPN, the recommended MTU to be configured on the peer VPN  gateway = 1460 bytes


Each instance must have at least one network interface. The maximum number of network instances per instance is 8, depending on the instance's machine type. nic0 is required and must be configured at instance creation.


Cloud Armor policies can be based upon the following:

  • Expression matches against requests from the IP address and contains a string in the user-agent header
  • Expression matches against requests that have a cookie with a specific value
  • Expression matches against requests from the region AU, US, etc.
  • Expression matches against requests from the region AU that are not in the specified IP range
  • Expression matches against requests if the URI matches a regular expression
  • Expression matches against requests if the Base64 decoded value of the user-id the header contains a specific value
  • The expression uses a preconfigured expression set to match against SQLi attacks


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