What happened?
CloudFlare is unable to establish an SSL connection to the origin server.
What can I do?
If you're a visitor of this website:
Please try again in a few minutes.
If you're the owner of this website:
It appears that the SSL configuration used is not compatible with CloudFlare. This could happen for a several reasons, including no shared cipher suites. Additional troubleshooting information here.
A 525 error states that the SSL handshake between CloudFlare and the origin server that hosts the domain failed. This means that CloudFlare is set to use Full SSL in the CloudFlare settings for the domain, so CloudFlare attempts to make a connection using SSL (for requests beginning in https://) to server that hosts the domain.
Likely reasons for this failure include:
The origin server does not support or is not configured properly for SNI.
The cipher suites that CloudFlare accepts and the cipher suites that the origin server uses do not match.
The origin server is not configured to use SSL and Full SSL is enabled in the CloudFlare settings.
https://srytk.com/301.html
上記が参考になるのでは。
https://support.krystal.co.uk/entries/25763432-Using-SSL-with-CloudFlare-Avoiding-520-errors
上記はとあるプロバイダでのQAです。
お使いのサーバに合わせて読み替えてください。
方法1、CloudFlare を Flexible SSL に設定して、自身のサーバでは自己署名SSLを使う
方法2、自身のサーバに Full SSL をインストールする
同じような不具合があるみたい
http://takahashifumiki.com/web/3194/
考えられる原因として
・サーバのSSLがおかしい
・サーバのSSL証明書の有効期限切れ
・サーバとのSSL通信中に何かしらのエラーが発生した
だと思います
SSL外して通信できるか確認して、できるなら一度cdnを外してやってみる
それでダメならサーバがおかしいことになるし問題ないならcdnがおかしいということになります