Synology Certifikate problems

Hi there

NAS: Synology DSM 6.2.2-24922 Update 4
Client OS: Windows 10 1909

My Synology didn’t renew the certificate automatically. I do not know why. Manual renewal was not possible. Tried everything possible for 3 days. Always error messages. Deleting the old certificate entry did not help either.

Then I applied Michaelbierman’s tip.
2018 Jun '18
“So I went to Control Panel> External Access> Advanced in Synology and reset” hostname or static IP “. It seems to be working now. Very strange, but I think I’m fine now.”

Certificate requested again. Error message: “… please register again at the DSM”
I registered again on DSM. Now I see 3 certificates with the expiry date 2020-04-15. :slight_smile:

Which of the displayed certificates should I use now? Can the excess certificates be deleted?

Sorry for my bad English.

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Hi @singel

checking your domain it looks like you have already found a solution -

There is a new certificate:
expires in 90 days - 1 entry

And you use it. Your port 443 and your port 5001.

Older checks (last is 40 minutes old) had a Grade N (certificate invalid), but now Grade I is better. One typical error of a DSM:


with a http status 403, but that's not a critical problem.

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