SSL certificates

letsencrypt certification authority is free, automated and open.

On host that has apache/nginx install acme.sh

wget -O -  https://get.acme.sh | sh
. ~/.bashrc
# now /root/.acme.sh/acme.sh.env is avalaible with bash alias

with nginx enable this server on port 80 for initial challenge

site.conf

server {
      listen 80;
      server_name  "mail.csgalileo.org";
 
      # create this folder empty
      location /.well-known/acme-challenge {
        root /var/www;
	allow all;
      }
 
      location / {
	return 301 https://$server_name$request_uri;
      }
}

# /var/www is documentroot of mail.csgalileo.org
acme.sh --issue -w /var/www -d mail.csgalileo.org --keylength ec-256

results in /root/.acme.sh/mail.csgalileo.org_ecc/

[Fri Oct 14 08:05:13 CEST 2016] Creating account key
[Fri Oct 14 08:05:15 CEST 2016] Registering account
[Fri Oct 14 08:05:18 CEST 2016] Registered
[Fri Oct 14 08:05:20 CEST 2016] Update success.
[Fri Oct 14 08:05:20 CEST 2016] Creating domain key
[Fri Oct 14 08:05:20 CEST 2016] Single domain='mail.csgalileo.org'
[Fri Oct 14 08:05:20 CEST 2016] Verify each domain
[Fri Oct 14 08:05:20 CEST 2016] Getting webroot for domain='mail.csgalileo.org'
[Fri Oct 14 08:05:20 CEST 2016] _w='/var/www'
[Fri Oct 14 08:05:20 CEST 2016] Getting new-authz for domain='mail.csgalileo.org'
[Fri Oct 14 08:05:23 CEST 2016] Verifying:mail.csgalileo.org
[Fri Oct 14 08:05:31 CEST 2016] Success
[Fri Oct 14 08:05:31 CEST 2016] Verify finished, start to sign.
[Fri Oct 14 08:05:34 CEST 2016] Cert success.
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
[Fri Oct 14 08:05:34 CEST 2016] Your cert is in  /root/.acme.sh/mail.csgalileo.org_ecc/mail.csgalileo.org.cer 
[Fri Oct 14 08:05:34 CEST 2016] Your cert key is in  /root/.acme.sh/mail.csgalileo.org_ecc/mail.csgalileo.org.key 
[Fri Oct 14 08:05:34 CEST 2016] The intermediate CA cert is in  /root/.acme.sh/mail.csgalileo.org_ecc/ca.cer 
[Fri Oct 14 08:05:34 CEST 2016] And the full chain certs is there:  /root/.acme.sh/mail.csgalileo.org_ecc/fullchain.cer 

HOST=mail.csgalileo.org
acme.sh --installcert -d $HOST \
--certpath /etc/ssl/certs/${HOST}.cer  \
--keypath /etc/ssl/private/${HOST}.key \
--capath /etc/ssl/certs/ca.cer    \
--fullchainpath /etc/apache2/fullchain.cer \
--ecc \
--reloadcmd  "service apache2 reload"

apache.conf

 SSLngine on
 SSLCertificateFile /etc/ssl/certs/mail.csgalileo.org.cer
 SSLCertificateKeyFile /etc/ssl/private/mail.csgalileo.org.key 
 SSLCertificateChainFile /etc/apache2/fullchain.cer
 SSLCACertificateFile /etc/ssl/certs/ca.cer

site.conf

server {
  listen 443 ssl;
  server_name  "scipio.csgalileo.org";
 
  # ...
 
  ssl_certificate /etc/ssl/certs/scipio.csgalileo.org.cer;
  ssl_certificate_key /etc/ssl/private/scipio.csgalileo.org.key;
}

HOST=mail.csgalileo.org
acme.sh --installcert -d $HOST \
--certpath /etc/ssl/certs/${HOST}.cer  \
--keypath /etc/ssl/private/${HOST}.key \
--capath /etc/ssl/certs/ca.cer    \
--ecc \
--reloadcmd  "service nginx reload"

in cron there is already

04 0 * * * "/root/.acme.sh"/acme.sh --cron --home "/root/.acme.sh" > /dev/null

acme.sh --renew  -d  mail.csgalileo.org  --force --ecc