secure connection failed

I'm assuming you're talking about https here (and not ssh). I was able to receive your cert with openssl (that means port 443 is open in your firewall) but not with curl. Since curl will try to use https and not a protocol that only openssl knows, I can only assume your web server is not configured correctly.

I can show you the openssl results if you want, but they're long and I guarantee you won't understand them. Trust me on this…

Here's the curl output:

* Connected to 139.177.192.128 (139.177.192.128) port 443 (#0)
* ALPN: offers h2
* ALPN: offers http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS alert, handshake failure (552):
* error:14094410:SSL routines:ssl3_read_bytes:sslv3 alert handshake failure
* Closing connection 0

The handshaking error is clearly the domain of your web server.

-- sw

is there any other way to make work

I don’t understand your question…

• I don’t know what you’re trying to do. What are you trying to “make work”?
• I don’t have any details about your operating environment.
• I can’t see inside your Linode.
• I don’t have any information about your level of expertise.

What I do know is that you’ve acquired a Let’s Encrypt certificate for an unknown domain name to try to use a Marketplace app (a guess on my part) that I’ve never heard of.

I’m at a clear disadvantage here… I’m very good at a lot of things but, I’m afraid, mind reading is not one of them.

— sw

haha