Introduction
After the initial setup of Microsoft Tunnel, or when troubleshooting connectivity issues, the first thing to verify is whether the public endpoint is actually reachable. Before looking at logs or diving into the Intune portal, three quick checks from an external machine will confirm the network path is working end to end.
- Before troubleshooting logs, verify the basics from outside the server
- Three checks that cover the full path: DNS, port, and keep-alive
- If DNS or port fails, looking at agent logs is a waste of time – fix the network path first