Synology NAS, request certificate doesnt work

Hi there,

I have created a subdomain to my Synology NAS and this works: https://thebatstorage.itbuck.nl

Also i forwarded port 80 to my NAS, tested it with: telnet thebatstorage.itbuck.nl 80

I get connected, so the port is open.

But when i request a certificate in the Synology software (DSM 7.1) i get after a few minutes of waiting an error, to check IP, reverse proxy etc.

But when i request a certificate for the subdomain of synology, thebatstorage.synology.me, it works!

So i'm wondering, is there some additional settings/records i need to add in Direct Admin from my domain itbuck.nl ?

With kind regards,

Buck Baggen

Hi @buckbaggen, and welcome to the LE community forum :slight_smile:

The two names don't return identical IP information:

Name:      thebatstorage.itbuck.nl
Addresses: 2a06:2ec0:1::135
           94.209.14.242

Name:    thebatstorage.synology.me
Address: 94.209.14.242

The problem is likely in the IPv6 path.
LE will prefer IPv6 over IPv4 when present.
Ensure the IPv6 path is working OR remove the AAAA address from DNS.

4 Likes

Hi there,

Thanks for the quick reply!

That explains a lot!

I removed the ipv6 records from my subdomain. Now wait a bit for the DNS servers to sync and then try again :slight_smile:

I post the results here.

2 Likes

It works now! Thanks a lot!

3 Likes

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