Your on-premises network connects to Azure through a VPN gateway named VPN1. To monitor the Azure gateway health probe for VPN1, which TCP port should the probe use?
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Correct answer: 8081.
Why this is the answer
Azure VPN gateways use TCP port 8081 for health probes. This port is specifically designated for monitoring the health and availability of the gateway itself, ensuring it can properly route traffic. If the health probe on port 8081 fails, it indicates an issue with the gateway's internal processes or connectivity. Port 443 is used for HTTPS traffic. Port 1723 is used for PPTP VPNs, which Azure VPN Gateways do not primarily use for health probes. Port 3389 is used for Remote Desktop Protocol (RDP). Port 65500 is used for Azure Load Balancer health probes, not VPN gateways.
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