Letsencrypt.org
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Let’s Encrypt is a free, automated, and open certificate authority https://letsencrypt.org/
Config
/etc/letsencrypt/cli.ini
#use a 4096 bit RSA key instead of 2048
rsa-key-size = 4096
server = https://acme-v01.api.letsencrypt.org/directory
email = xxx@yyy.com
authenticator = webroot
#manual
agree-dev-preview = True
agree-tos = True
Apache config
#/etc/apache2/conf.d/letsencrypt.conf
#let's encrypt global dir
Alias /.well-known/acme-challenge/ /srv/www/global-domain.tld/htdocs/.well-known/acme-challenge/
<Directory "/srv/www/xxx.de/htdocs/.well-known">
Order allow,deny
Allow from all
</Directory>
<IfModule mod_headers.c>
<LocationMatch "/.well-known/acme-challenge/*">
Header set Content-Type "text/plain"
</LocationMatch>
</IfModule>
Create certificate via webroot (recommended)
umask 022
./letsencrypt-auto certonly -d domain.tld -d www.domain.tld
IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at
/etc/letsencrypt/live/domain.tld/fullchain.pem. Your cert will
expire on 2016-02-17. To obtain a new version of the certificate in
the future, simply run Let's Encrypt again.
Create certificate manuell
cd ~/letsencrypt
./letsencrypt-auto certonly -d domain.tld -d www.domain.tld
Make sure your web server displays the following content at
http://www.domain.tld/.well-known/acme-challenge/a9q3mxxxxxxxZqxPKlKKI8KY before continuing:
a9q3mxxxxWo-W9ihRohAuoxxxxLeppj8qZj07JvRRAqRB4qSFg
with another shell under /srv/www/xxx/htdocs
umask 022
printf "%s" a9q3mxxxxWo-W9ihRohAuoxxxxLeppj8qZj07JvRRAqRB4qSFg > .well-known/acme-challenge/a9q3mxxxxxxxZqxPKlKKI8KY
Press ENTER to continue
IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at
/etc/letsencrypt/live/tld.com/fullchain.pem. Your cert will
expire on 2016-02-05. To obtain a new version of the certificate in
the future, simply run Let's Encrypt again.
Apache ssl
SSLCertificateFile /etc/letsencrypt/live/tld.com/cert.pem
SSLCertificateChainFile /etc/letsencrypt/live/tld.com/chain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/tld.com/privkey.pem