使用curl來進行驗證連線
// location
[root@apServer ~]$ curl -L https://111.222.33.444
curl: (51) Unable to communicate securely with peer: requested domain name does not match the server's certificate
// location、insecure
[root@apServer ~]$ curl -k -L https://111.222.33.444
<meta http-equiv="Refresh" content="0;URL='https://test.com.tw/main.html'" />[root@apServer ~]$ ^C
// error
[root@apServer ~]$ curl -k -L https://999.999.99.999
curl: (6) Could not resolve host: 999.999.99.999; Unknown error
###> curl -L <URL>
<URL>：連線網址，含http(s)://
如果是https，且對方為ip或非使用公共憑證，請在測試語法內加上 -k
-L, --location Follow redirects
-k, --insecure Allow insecure server connections when using SSL
