Misconfigured Google Cloud Router
TLDR: Misconfigured Google Cloud Router, introduced in 2014, can result in connectivity issues, inefficient route propagation, and potential security vulnerabilities. Errors such as improper BGP session configurations, misaligned route advertisements, or insufficient policy control can disrupt communication between Google Cloud VPCs and on-premises networks or other cloud environments.
https://cloud.google.com/network-connectivity/docs/router
One common issue with Google Cloud Router is incorrect BGP session setup. For example, failing to establish or maintain peering with on-premises routers due to mismatched BGP settings such as ASNs (Autonomous System Numbers) or IP configurations can interrupt hybrid connectivity. Similarly, overly permissive route advertisement policies may expose sensitive routes to unintended peers, increasing the risk of unauthorized access or routing inefficiencies.
https://cloud.google.com/network-connectivity/docs/router/how-to/creating-configuring
To mitigate misconfigurations, administrators should ensure proper alignment of BGP policies and implement strict route filtering to control the flow of advertised and received routes. Utilizing tools like Google Cloud Monitoring and Google Cloud Logging enables proactive identification and resolution of misconfigurations. Regular audits, clear documentation, and adherence to best practices ensure that Google Cloud Router configurations support secure and optimized hybrid or multi-cloud networking.
https://cloud.google.com/network-connectivity/docs/router/concepts/router-overview