Argo Tunnel nested subdomain

I want to use a nested subdomain like for my Argo Tunnel. Trying this, cloudflared gives me the following error:

“You asked for a tunnel to, but your certificate is valid only for [*]”

Starting a tunnel with cloudflared tunnel --hostname and visiting it in the browser also results in an “ERR_SSL_VERSION_OR_CIPHER_MISMATCH” error.

Is there a way to create a valid certificate for the nested subdomain? If so, how I configure this for Argo?


You’d need ACM:


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