Hi, Im trying to use an automatic DNS plugin for my HostGator DNS, is the RFC able to work with it?
I did the manual and works but I cannot be changing manually the dns TXT records each time I need a certificate, or is there a way to use always the same TXT records?
also if I use manual I cannot renew it automatically
you have to change the dns TXT entry, if you want a new certificate.
No, this isn't possible.
Letsencryt must check that you are the domain owner. So one new order -> new token (random strings) per domain name -> computed value used token and your account key -> set as TXT entry.
Do you need a wildcard certificate? If not, is it possible to use http-01 - validation?
To answer your other question, Hostgator has no API and doesn’t support RFC2136. You can always choose to use a different DNS host, there are numerous free ones that fit the bill and are supported by Certbot or other ACME clients.