Collabora Subdomain Certification error (?)

ℹ️ Support
1

Hello everybody

I’m really happy with my Nextcloud now (Home Office is of course a good time to take care of the configuration while working :stuck_out_tongue_winking_eye: ). Unfortunately there are still a few hitches here and there. I’m just setting up “Collabora” and followed onlineinstructions. Unfortunately, when I call “office.my-domain.com” the error “NET::ERR_CERT_COMMON_NAME_INVALID” (A name record with wildcard is stored, added to trusted-domains). Suspected that it is due to the lack of certificate - letsencrypt shows me an error when I want to get a cert for *.my-domain.com… I’m running out of idead, does anyone have an idea?

Thank you very much for your feedback in advance!

Many kind greetings

2

Let’s Encrypt only allows to generate wildcard certificates if you are using “dns-01” as verification protocol. Due to the fact that only a few users have full access to their internet domain record, you most likely currently use “http-01”.
In this case you can only create a Let’s Encrypt certificates which contains all desired fqdn, e.g. office.my-domain.com, nextcloud.my-domain.com, mail.my-domain.com, etc., or you generate separate ones for each of these sub-domains.

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