My SSL certification doesn't work well on my Synology NAS

Website, Application, Performance Security
1

What is the name of the domain?

jackyshome.com

What is the error number?

ERR_SSL_PROTOCOL_ERROR

What is the error message?

ERR_SSL_PROTOCOL_ERROR

What is the issue you’re encountering

How can I use HTTPS to log on my website?

Was the site working with SSL prior to adding it to Cloudflare?

Yes

What is the current SSL/TLS setting?

Flexible

Screenshot of the error

IMG_0508.png
IMG_0508.png1179×2556 123 KB

2

Hi there,

Currently, the record is not proxied, but the Cloudflare origin certificate is only valid for proxied records. On the other hand port 15001 is not a Cloudflare supported port.

So you either have to set it to a Cloudflare supporter port, and then you’ll be able to proxy the NAS, or you have to leave it as DNS only request a certificate from a valid CA.

Related

My advice is that you have your router forwarding one of Cloudflare supported ports (for instance 8443), internally to the Synology IP on 15001.
This way
1 - you’d be able to access it externally in yourdomain.com:8443
2 - you’d be able to set the DNS record as proxied.
3 - and the origin certificate would be valid.
4 - as a bonus you’d be able to use all Cloudflare features in your account like waf rules.

Edit.
As an end note, if your Synology supports it, consider using a cloudflared tunnel instead as it would not require your current DDNS, it would not require a certificate at the origin, and you’d still have external access, with the added bonus that you could integrate it with Cloudflare login, or SSO.

Take care.

3

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