There are two ways to deal with WordPress Multisite on Directadmin powered server, and you should choose one according to your preferences and requirements. First of all you should ask yourself a question, and an answer on it will help to determine a way which you will go.
You might consider configuring exim to exclude original message from bounce in order to reduce chances to get blacklisted by other mail servers. As they might think that you are spamming them.
If any try to update MySQL 5.6.x on a Debian server with Directadmin fails, and you see that download of a archived file can not succeed due to the fact of the missing file. Here is a way on how to solve it.
Want to have nginx_mainline installed on your server to gain from using HTTP/2, here are new-way instructions on how to install it with an automatic script.
If after an account restoration or any other action you don't see a domain on a "Custom HTTPD Configurations" page in Directadmin, and you are still sure that domain exists at an user level on a server, then there is a quick way to get it fixed.
A usernames leakage on Directadmin servers through phpMyAdmin logs was recently discovered. And here we will guide you through the security update in order to protect your server against this vulnerability.
On July 18th, 2016, a CGI application vulnerability, referred to as "HTTPoxy", was disclosed. An attacker can exploit vulnerable deployments by passing an HTTP Proxy header with their request, which will alter the URL used by the application when contacting backing services. This can be used to leak credentials, modify responses to the application, etc.
If Dovecot update/build with custombuild fails with an error: "sha1.h:80: error: static or type qualifiers in abstract declarator", here is a how to fix it.
It was noticed that caching does not work in NGINX if to try and enable it on a Directadmin server when using NGINX+Apache scheme. Here you can learn why...
If Apache or nginx does not start after Let's Encrypt cert renewal, and you see an error "certificate routines: X509_check_private_key:key values mismatch)" with nginx, here is a solution.