hi, i’m trying to create a SSL certificate using Lets Encrypt for my webapp under a ROS router. My ISP blocks port 80/443 so my only choice is to achieve the DNS challenge. Is this possible with mikrotik’s ddns (the one under IP->Cloud) ?
Not with the current implementation of letsencrypt in RouterOS 7. However if you have a container capable Mikrotik router (or other device), you can use this docker image, https://hub.docker.com/r/foorschtbar/routeros-letsencrypt, to do DNS-01.