Should you see any TLS/SSLrelated errors "tls_post_process_client_hello:no shared cipher" in Exim's logs the reason might be still the same. Check the details here
NGINX fails to start after an upgrade of DirectAdmin and the web-server with the error [emerg] unknown directive "|NGINX_REDIRECTS|". Here is a short guide on how to deal with it.
ClamAV stopped and does not start any longer. And directadmin alerts: The service 'clamd' on server server.domain.com is currently down. Here is a possible cause and solution.
Since the version 1.61.0 of DirectAdmin a jailed shell and jailed cron are supported. This can be achieved with a help of BubbleWrap the unprivileged sandboxing tool. On Linux servers it gives another layer of a security, and restricts users.
At the moment of the publication DirectAdmin can install the following PHP extensions: gmp, ioncube, imagick, imap, opcache, phalcon, suhosin, xmlrpc, zend. The listed extensions can be installed server-wide for all PHP versions.
The directive "disable_functions" allows to disable certain functions. It takes on a comma-delimited list of function names. DirectAdmin uses the directive for security purposes, and here is a way how to customise it.
Why is that a bad idea to use whitelist_domains and whitelist_senders on DirectAdmin servers? Check the article to learn details.
Should you need to install old and unsafe PHP 5.x on FreeBSD 12.x server with DirectAdmin here you can find a short guide on how to achieve it.
The Custombuild script from DirectAdmin can be used to install a phalcon extension for PHP 7+.
If PHP scripts running under an old version of the language fail to connect to SMTP server under Directadmin, and in logs can you see lines containing "TLS error on connection from hostname", here is a possible fix.