Certbot letsencrypt on different port than 443

Solution 1:

According to: https://community.letsencrypt.org/t/how-to-specify-a-port-different-from-443-for-the-dvsni-challenge/12753/4

This is not possible with certbot. You should take a look at the other implementation method here: https://community.letsencrypt.org/t/list-of-client-implementations/2103

Solution 2:

if the case it's similar to my servers at a site, in which I have the public ip ports 80 and 443 forwarded to the private ip ports 8080 and 8443, you can do it this way: certbot certonly --manual

that will ask you to make available a hash in a particular URL, easily accomplished by creating a file in your root webserver directory with the requested contents, i.e http://your.site.com/178412ufhjakjkaslkasflalifalafllkdflkjf and the challenge being adsjaskldlkajsdlkasdlakjsldjalskdasdada

so you create /var/www/html/178412ufhjakjkaslkasflalifalafllkdflkjf, and its contents should be adsjaskldlkajsdlkasdlakjsldjalskdasdada

hope it helps