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+# Change DNS server to Vultr for Certbot automation and * certificate
+
+https://www.vultr.com/docs/introduction-to-vultr-dns/
+https://certbot.eff.org/instructions?ws=nginx&os=arch&tab=wildcard
+https://github.com/bsorahan/certbot-dns-vultr
+https://github.com/alexzorin/certbot-dns-multi
+
+https://wiki.archlinux.org/title/certbot#Managing_Nginx_server_blocks
+
+https://serverfault.com/questions/896711/how-to-totally-remove-a-certbot-created-ssl-certificate
+
+
+certbote delete
+pacman -Rns certbot-nginx # probably still needed, should install just in case
+yay -S certbot-dns-vultr
+
+enable api https://www.vultr.com/api/
+https://my.vultr.com/settings/#settingsapi
+
+it autodetects tehe subnet for the access control (in my case an ipv6)
+
+create file with contents:
+
+```ini
+dns_vultr_token = aabbccddeeff112233445566778899
+```
+and permissions: `600`
+update create certificate script (by adding): 
+
+```sh
+CREDENTIALS_FILE=/path/to/credential/file
+DOMAINS=example.com,mail.example.com,*.example.com
+EMAIL=hey@example.xom
+
+certbot certonly --domains $DOMAINS --email $EMAIL \
+--authenticator dns-vultr
+--dns-vultr-credentials $CREDENTIALS_FILE
+--preferred-challenges dns-01
+```
+
+the certificate will be installed at:
+
+```
+/etc/letsencrypt/live/example.com/fullchain.pem
+/etc/letsencrypt/live/example.com/privkey.pem
+```
+
+
+the renewal configuration is stored at: `/etc/letsencrypt/renewal/example.com.conf` useful when needing to change the api key
+
+test renew:
+
+```sh
+certbot renew --dry-run
+```
+
+update the `certbot-renew.service` by adding the `nginx.service` restart hoook: ``
+by doing `systemctl edit certbot-renew.service` and adding:
+
+```ini
+[Service]
+ExecStart=/usr/bin/certbot -q renew --post-hook "systemctl reload nginx.service"
+```
+
+create redirect all to https config: https://phoenixnap.com/kb/redirect-http-to-https-nginx
+
+```nginx
+server {
+    listen 80 default_server;
+    server_name _;
+    return 301 https://$host$request_uri;
+}
+```
+
+add the redirect config to `nginx.conf`
+
+
+create the config file for 443 ssl (to include in each config file):
+
+```nginx
+listen 443 ssl;
+listen [::]:443 ssl;
+http2 on;
+ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
+ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
+include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+```
+
+add this config to all config files that require it