My YunoHost server
Hardware: VPS bought online (ARM)
YunoHost version: 22.214.171.124
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no
Description of my issue
Hey there, I have an issue sending file with XMPP. It seems there were some problems that were fixed quite recently, but now I have a certificate issue. From my understanding, now the files are sent through xmpp-upload.domain.tld.
Depending on the client, it either display some spooky message because the certificate is not correct (on Conversations for Android), or fail to send the message without explanation (Dino on Linux).
When visiting xmpp-upload.domain.tld with Firefox, it refuses to connect because of HSTS with error code “SSL_ERROR_BAD_CERT_DOMAIN”.
I think I just need to sign a certificate for xmpp-upload.domain.tld with Let’s Encrypt, as mentionned here. But I have no idea how to do that. I thought to add the domain with the Yunohost web admin to get a LE certificate, but logically it is not allowed to use this subdomain.
I guess my question can be summed up :
TL;DR : how to sign with Let’s Encrypt a subdomain that is not registered in the Yunohost web admin ?