I have changed my synology and I cannot add a new lets and crypt certificat on my new syno. Possible to delete my old certificat please ?
Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
Concernant l'erreur, j'ai eu une fois le message comme quoi je ne pouvais pas demander un nouveau certificat car j'en avais trop.
Sinon, les messages récurrents sont un blocage IP tel que Firewall, blocage box ou proxy inversé.
Je désactive le firewall pour mettre a jour le certificat. J'ai autorisé le port 80 et 443 sur mon NAS et sur ma box .... Je ne sais plus quoi faire. Merci pour votre aide
Let's Encrypt has various limits (see here) but so does Synology. You have not gotten any certs for that domain this week so you have not exceeded that Let's Encrypt limit. And, unless you are trying this many times each hour you have not exceeded the "too many failed attempts' limit.
This is likely a Synology error and might be fixed with:
I don't know. We see the "Too Many" error often from Synology customers and there is not a clear fix. The Synology forum might be more helpful.
Your other problems are best tested using the Let's Debug site. You have different problems affecting the 3 different domain names. To get a cert for all 3 the Let's Debug test should be OK for all of them