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Wordpress

SMTP Authentication Required

FYI, Wordpress must use SMTP authentication. New Wordpress sites may come with a plugin already configured, but you have to change the from address, etc. If Wordpress sends a message using sendmail (Linux) it will route to our system monitors. This is to protect from spammers abusing sendmail.

On the other hand, if a website sends too much SMTP authenticated email, our network administrators should receive a message from the mail server warning of spammers.

SSL Wildcard Certificate

Here are some simple instructions on creating a wildcard certificate with letsencrypt.

sudo certbot certonly --manual --preferred-challenges=dns --email [email protected] --server https://acme-v02.api.letsencrypt.org/directory --agree-tos -d example.com -d *.example.com

Example of Apache Config

Shortcut method:

    Include /var/vnix/ssl/conf/letsencrypt/mac/cf.conf

Complete config

Header                  always set Strict-Transport-Security "max-age=31536000; preload"
SSLEngine               on
SSLCompression          off
SSLHonorCipherOrder     on
SSLProtocol             all -SSLv2 -SSLv3 -TLSv1
SSLOptions              +StrictRequire
SSLCipherSuite          ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
SSLCertificateFile      /opt/local/etc/letsencrypt/live/vnix.cloud/fullchain.pem
SSLCertificateKeyFile   /opt/local/etc/letsencrypt/live/vnix.cloud/privkey.pem