Fui testar o Firewall (UFW) no site:
e recebi a seguinte mensagem de erro: Solicited TCP Packets: RECEIVED (FAILED).
As detailed in the port report below, one or more of your system's ports actively responded to our deliberate attempts to establish a connection. It is generally possible to increase your system's security by hiding it from the probes of potentially hostile hackers. Please see the details presented by the specific port links below, as well as the various resources on this site, and in our extremely helpful and active
Peço ajuda para solucionar esta falha.
Desde já muito Obrigado!