CloudLink：遠端 HTTPS 伺服器未強制執行 HTTP 嚴格傳輸安全性 （HSTS）

CloudLink：安全性掃描報告：

The remote HTTPS server is not enforcing HTTP Strict Transport Security (HSTS)
The remote HTTPS server does not send the HTTP "Strict-Transport-Security" header

HSTS 是一個可選的回應標頭，可以在伺服器上配置，以指示瀏覽器僅使用 HTTPS 進行通信。缺乏HSTS允許降級攻擊，SSL剝離中間人攻擊，並削弱cookie劫持保護。

- Navigate to the Cloudlink UI login page.
- Right click on white empty space and select 'Inspect'.
- Select the 'Network' tab.
- Select one of the Cloudlink HTTP requests on the left panel.
- Match the response headers you're seeing to what we expect to see from the KB article

HTTP 回應具有所有標頭，預設情況下由 https://docs.spring.io/autorepo/docs/spring-security/4.2.3.RELEASE/reference/html/headers.html 設定

            HTTP/1.1 200 OK
            Date: Fri, 22 May 2020 11:51:57 GMT
            Cache-Control: no-cache, no-store, max-age=0, must-revalidate
            Pragma: no-cache
            Expires: Thu, 01 Jan 1970 00:00:00 GMT
            Strict-Transport-Security: max-age=31536000 ; includeSubDomains
            X-XSS-Protection: 1; mode=block
            X-Frame-Options: SAMEORIGIN
            X-Content-Type-Options: nosniff
            Content-Type: text/html
            Last-Modified: Tue, 10 Sep 2019 17:33:22 GMT
            Accept-Ranges: bytes
            Vary: Accept-Encoding, User-Agent
            ETag: W/"C/NxCAz49KYC/NwZBDEXzM"
            Content-Length: 1349