Advanced Dev Tunnels Features
summary
Dev Tunnels is a secure-by-default relay that gives a unique DNS for a local app, encrypts and authenticates connections, and requires the same AAD or GitHub account unless access is changed. The CLI demos use dotnet new, MS Identity Apps tool, Visual Studio, and Thunder Client; examples use ports 7042 and 5150. Practical gotchas: the relay rewrites the Host header by default (use dev tunnel update host-header unchanged), you must register the tunnel URI as a valid redirect in Azure, and API clients can use an x-tunnel-authorization access token or dev tunnel connect port forwarding.
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