You have an on-premises network and an Azure virtual network.
You establish a Site-to-Site VPN connection from the on-premises network to the Azure virtual network, but the connection frequently disconnects.
You need to debug the IPsec tunnel from Azure.
Which Azure VPN Gateway diagnostic log should you review?
Click on the arrows to vote for the correct answer
A. B. C. D.D
https://docs.microsoft.com/en-us/azure/vpn-gateway/troubleshoot-vpn-with-azure-diagnosticsWhen a Site-to-Site VPN connection between an on-premises network and an Azure virtual network is established, it relies on an IPsec tunnel to ensure secure communication between the two networks. In this scenario, the VPN connection is frequently disconnecting, which indicates that there may be an issue with the IPsec tunnel.
To debug the IPsec tunnel from Azure, you need to review the appropriate VPN Gateway diagnostic log. The correct diagnostic log to review depends on the specific type of issue you are experiencing.
Option A: GatewayDiagnosticLog - This diagnostic log contains diagnostic information about the VPN gateway resource. It can provide insights into general VPN gateway connectivity issues, such as gateway failures, gateway restarts, and gateway configuration changes. However, it does not provide detailed information about IPsec tunnels specifically.
Option B: RouteDiagnosticLog - This diagnostic log contains information about route propagation and route table changes for a VPN gateway. It can help identify issues related to routing between the on-premises network and the Azure virtual network. However, it does not provide detailed information about IPsec tunnels specifically.
Option C: IKEDiagnosticLog - This diagnostic log contains information about Internet Key Exchange (IKE) negotiations, which are used to establish the IPsec tunnel between the on-premises network and the Azure virtual network. This log can provide detailed information about IKE negotiations, including any errors or warnings that may be causing the VPN connection to fail.
Option D: TunnelDiagnosticLog - This diagnostic log contains detailed information about the IPsec tunnel itself, including information about phase 1 and phase 2 negotiations, as well as packet captures of the tunnel traffic. This log can provide the most detailed information about the IPsec tunnel and is the best diagnostic log to review for issues with the tunnel.
Therefore, the correct answer to this question is option D: TunnelDiagnosticLog. By reviewing this diagnostic log, you can get detailed information about the IPsec tunnel and identify any issues that may be causing the VPN connection to frequently disconnect.