404 Not found on SSL certificate renew with certbot from letsencrypt
I spend a lot of time figuring out why I kept getting a ‘404 Not Found’ when I wanted to renew my SSL Certificate with certbot.
Long story short: invalid ipv6 DNS Mapping.
I got it working by removing the ipv6 DNS entry. I’ll be fixing it in a proper way when there is more time available.
But there were other gotcha’s as well:
- basic auth on the directory
- iptables blocking certain traffic