Infrastructure, Systems, and Connectivity
DirectAdmin provides a powerful and flexible IP management system, allowing administrators to bind IPs, assign dedicated or shared IPs, use Multi-IP configurations, enable IPv6, link IPv6 to IPv4, and even perform full server IP swaps. This guide covers all essential techniques and practical steps for managing IPs efficiently.
DirectAdmin provides a robust and flexible IP management system, allowing administrators to bind IPs, assign dedicated or shared IPs, use Multi-IP configurations, enable IPv6, link IPv6 to IPv4, and perform full server IP swaps. This guide explains all essential techniques and practical steps for managing IPs effectively.
The Multi Server Setup (MSS) feature in DirectAdmin enables multiple servers to communicate and synchronize data. Originally designed for DNS zone mirroring, MSS has evolved into a powerful system supporting domain checks, user checks, email account synchronization, cross server user visibility, and experimental user/domain replication. This guide explains all MSS components, how they work, and how to configure them safely.
DirectAdmin provides multiple update channels, automated update mechanisms, and several methods for manual upgrades. This guide explains how update channels work, how to enable or disable auto updates, how to update DirectAdmin via GUI or CLI, how to install a specific build, and how to check the latest available version using DNS TXT records.
DirectAdmin requires a valid license to operate. This guide explains how to check your license, the difference between modern and legacy licenses, what Limited licenses are, how over limit mode works, how to fix common licensing errors, how to manually update your license key, and how to troubleshoot broken licensing systems.
The DirectAdmin Message System handles system notifications, tickets, and internal messages. This guide explains how the “From” address is determined, how system generated and user generated messages differ, how to automatically clean old messages, and how to customize message templates to include message content.
DirectAdmin uses a combination of real-time system quotas, log-based bandwidth tracking, and automated tally processes to calculate disk usage and bandwidth consumption. This guide explains how disk usage is calculated, why users may exceed limits, what bandwidth DirectAdmin counts, how reseller bandwidth is handled, how overusage notifications work, and how historical bandwidth logs are stored.
DirectAdmin does not execute many operations immediately. Instead, it uses an internal task processor called dataskq, which collects tasks in a queue and processes them periodically. This mechanism improves performance, prevents redundant operations, and ensures efficient system behavior.
The directadmin.conf file is the core configuration file of DirectAdmin. Any variable missing from this file uses an internal default value, and adding a variable overrides that default. This guide provides a complete, categorized reference to the most important configuration variables, including security, SSL, backups, email, DNS, performance, and general system behavior.
DirectAdmin ships with a large collection of built in scripts designed to automate system tasks, manage services, handle backups, configure DNS, manage IPs, repair accounts, and more. This guide provides a complete reference to all scripts located in /usr/local/directadmin/scripts, explaining their purpose and how they are typically used.
The main DirectAdmin binary provides not only the web-based control panel but also a powerful command-line interface for managing users, domains, backups, updates, configuration, and debugging. This guide explains where the DirectAdmin binary is located, how to run the DirectAdmin service, how to use the da command, and provides a full reference to the most useful CLI operations.
DirectAdmin relies on a well defined directory structure that organizes configuration files, user data, templates, logs, and service components. This guide provides a complete overview of all essential directories and paths used by DirectAdmin and related services as of February 2026.
