This alert monitors inbound traffic disruptions to a Google Cloud VPN Gateway. Inbound traffic disruptions may indicate connectivity issues, misconfigurations, or resource constraints, potentially affecting the availability of services relying on the VPN connection. The alert is triggered when inbound traffic to the VPN Gateway drops below a defined threshold (e.g., 1 bytes) for more than 10 minutes. Monitoring this metric helps ensure the VPN Gateway's reliability and consistent data flow, which is critical for maintaining secure and uninterrupted connectivity. Customization Guidance: - Threshold: Adjust the traffic threshold based on your typical inbound traffic patterns and acceptable levels of disruption. - Monitoring Period: Configure the monitoring period to reflect the traffic variability and operational needs of your environment. - Notification Frequency: Set notification intervals to balance timely responses with avoiding alert fatigue during transient disruptions. Action: If this alert is triggered, verify the connectivity between the VPN Gateway and its peers, check for network configuration issues (e.g., routing, firewall rules), and ensure sufficient resources are available for the VPN Gateway. Review logs for error messages or abnormal patterns and resolve underlying issues to restore inbound traffic flow.

This alert monitors the status of tunnels on a Google Cloud VPN Gateway, specifically detecting when a tunnel connection goes down. A downed tunnel disrupts secure communication between networks, potentially causing service interruptions and connectivity issues. The alert is triggered when a VPN tunnel connection is reported as down for more than 10 minutes. Monitoring this metric helps ensure the consistent availability of VPN tunnels, which is critical for maintaining secure and uninterrupted network communication. Customization Guidance: - Threshold: Adjust the downtime duration threshold based on your tolerance for transient connectivity issues versus critical failures. - Monitoring Period: Set the monitoring period to reflect your operational needs and expected tunnel uptime requirements. - Notification Frequency: Configure notification intervals to ensure timely responses without causing alert fatigue during brief or non-impactful outages. Action: If this alert is triggered, investigate the status of the VPN Gateway and its peer devices, checking for issues such as network connectivity, misconfigurations, or resource constraints. Review logs for specific error messages or patterns, and ensure routing and firewall configurations are correct. Restart the VPN tunnel if necessary and consider implementing redundancy to minimize the impact of future downtimes.

This alert monitors the compliance of Google Cloud VPN Gateway with the High Availability (HA) Service Level Agreement (SLA). Non-compliance indicates that the VPN Gateway may not be meeting the availability and redundancy requirements promised under the HA SLA, potentially leading to service disruptions or connectivity risks. The alert is triggered when the VPN Gateway's availability metrics, such as tunnel uptime or failover performance, fall below the thresholds specified in the SLA for more than 10 minutes. Monitoring this metric helps ensure that the VPN Gateway operates within SLA parameters, maintaining reliable and resilient network connectivity. Customization Guidance: - Threshold: Adjust the threshold based on the specific SLA terms and your tolerance for deviations in availability or redundancy. - Monitoring Period: Set the monitoring period to align with SLA measurement intervals and operational needs. - Notification Frequency: Configure notification intervals to provide timely responses without overwhelming users with alerts during short-lived disruptions. Action: If this alert is triggered, verify the VPN Gateway's configuration and operational status, including failover readiness and tunnel health. Investigate logs for error messages or performance bottlenecks, and ensure that redundancy and load-balancing configurations are correctly implemented. Address any identified issues promptly to restore SLA compliance and maintain service reliability.

This alert monitors the activity status of the cloud-side connection in a High Availability (HA) VPN setup on a Google Cloud VPN Gateway. An inactive cloud-side connection indicates potential issues such as misconfigurations, resource constraints, or connectivity failures, which could disrupt secure communication between networks. The alert is triggered when the cloud-side connection in an HA VPN remains inactive for more than 10 minutes. Monitoring this metric helps ensure the reliability and availability of HA VPN connections, which is critical for maintaining resilient and secure network communication. Customization Guidance: - Threshold: Adjust the inactivity duration threshold based on your system’s tolerance for temporary disruptions versus critical failures. - Monitoring Period: Set the monitoring period to reflect your operational needs and the expected uptime of HA VPN connections. - Notification Frequency: Configure notification intervals to ensure timely responses while avoiding excessive alerts for transient inactivity. Action: If this alert is triggered, check the configuration and health of the VPN Gateway, including routing and firewall rules. Verify that the peer device is active and reachable, and investigate any logs or metrics for error messages or anomalies. Restart the cloud-side connection if necessary and ensure redundancy is in place to minimize the impact of future disruptions.

This alert monitors the detection of invalid packets on a Google Cloud VPN Gateway. Invalid packets can indicate issues such as misconfigurations, network attacks, or incompatible protocols, potentially affecting the security and reliability of VPN connections. The alert is triggered when the number of invalid packets received or sent by the VPN Gateway exceeds a defined threshold within a 10-minute period. Monitoring this metric helps ensure the security and proper functioning of the VPN Gateway by identifying and addressing anomalies in network traffic. Customization Guidance: - Threshold: Adjust the threshold based on your environment's typical traffic patterns and tolerance for invalid packets. - Monitoring Period: Set the monitoring period to align with your VPN usage and expected traffic patterns. - Notification Frequency: Configure notification intervals to balance timely responses with minimizing alert fatigue during short-term spikes. Action: If this alert is triggered, review the VPN Gateway's configuration, including encryption settings and routing rules, to ensure they are correct and consistent. Investigate logs for details on invalid packet sources and patterns, and check for potential security threats or compatibility issues. Address any identified misconfigurations or anomalies to prevent further occurrences.