同武汉电信 相同问题
```powershell
PS C:\Users\34357> http
http://detectportal.firefox.com/success.txtHTTP/1.1 200 OK
Accept-Ranges: bytes
Cache-Control: no-cache, no-store, must-revalidate
Connection: close
Content-Length: 8
Content-Type: text/plain
Date: Mon, 03 Feb 2020 11:28:41 GMT
ETag: "ae780585f49b94ce1444eb7d28906123"
Last-Modified: Mon, 15 May 2017 18:04:40 GMT
Server: AmazonS3
X-Amz-Cf-Id: YOWOQPKeJiKpEovydyuHFeqYlvlZNiJavVzZbVSKKDvhVxvO5adU3g==
success
PS C:\Users\34357> http
http://detectportal.firefox.com/success.txtHTTP/1.1 302 Found
Cache-Control: private, max-age=0
Cache-Control: no-cache
Connection: close
Content-Length: 0
Content-type: text/html
Expires: -1
Location:
https://www.rhgscf.comServer: nginx
```