OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to api.zoom.us:443

API and Webhooks
2
  1. server is not working on TLS 1.2

The Server supports TLS 1.2 and TLS 1.3. In if this was the case, all calls should fail.

  1. server sometimes blocks the port 443.

This could only happen for inbound connections due to some fail2ban rules, like to many
calls to xmlrpc from an external IP or to many failed login attempts, but not for outbound
connections.