OpenSSL SSL_connect: SSL_ERROR_SYSCALL when trying to connect from freeshell.de

I got free shell access to freeshell.de and I'm trying to install Deno there, but any IPv4 SSL connection from there to deno.land is instantly closed by deno.land:443. I could unpack the deno binary manually, but I still need a connection to https://deno.land to access the libraries.

I contacted the owner of freeshell.de, and he contacted the datacenter where the server is located. Together they came to the conclusion that the problem is on the side of deno.land. Maybe there's something wrong with the firewall rules or something.

The IP address of the freeshell.de server is 116.202.128.144.

Output from `openssl s_client -connect deno.land:443`:
```
CONNECTED(00000003)
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 301 bytes
Verification: OK
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
early data was not sent
Verify return code: 0 (ok)
---
```