Computer Networks

Computer Networks

Infrastructure, Systems, and Connectivity

Network ProtocolsCommunication InfrastructureOperating Systems and Server ManagementNetwork Security and EncryptionCloud Computing and Virtualization

Articles in this Section

Troubleshooting the DirectAdmin Service – Complete Diagnostic Guide for Common DA Issues

When the DirectAdmin panel becomes inaccessible, fails to load, or shows unexpected errors, a structured troubleshooting approach helps identify and resolve the issue quickly. This guide covers debugging DirectAdmin, diagnosing port 2222 issues, login failures, installation errors, permission problems, and granting secure access to DirectAdmin support.

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The Evolution Skin in DirectAdmin – Complete Guide, Features, Customization, and Professional Tips

Evolution is DirectAdmin’s modern, responsive, and fully JSON powered interface. It is not just a visual redesign—it introduces a new communication layer, advanced customization options, plugin friendly architecture, and a significantly improved user experience. This guide explains how Evolution works, how to enable it, how to customize it, and how to manage translations and legacy skins.

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CustomBuild in DirectAdmin – Complete Guide to Installation, Updates, Configuration, and Advanced Customization

CustomBuild is DirectAdmin’s primary software management system. It installs, updates, configures, and rebuilds essential services such as Apache, Nginx, PHP, MariaDB/MySQL, Exim, Dovecot, FTP servers, and more. Because most components are compiled from source, CustomBuild offers exceptional flexibility, fast access to new versions, and optimized performance.

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DNS and Nameservers in DirectAdmin – Complete, Practical, and Professional Guide

DNS is the backbone of the internet, responsible for translating domain names into IP addresses. DirectAdmin allows you to create private nameservers (ns1/ns2), manage DNS zones, configure DNS clustering, use external DNS, and troubleshoot common issues. This guide provides a complete, clear, and practical explanation of DNS concepts and their implementation in DirectAdmin.

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Managing DNS Records in DirectAdmin – Complete Practical Guide for Administrators

DirectAdmin provides a powerful DNS management system that allows administrators to control TTL values, create SRV records, enable DNSSEC, manage subdomain delegation, automate TLSA records, and perform mass DNS updates. This guide explains all essential DNS operations in DirectAdmin with real-world examples and best practices.

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DNS Troubleshooting in DirectAdmin – When named is Running but Domains Do Not Resolve

Sometimes the named (BIND) service runs normally, yet DNS queries fail or domains do not resolve from outside. This guide provides a complete troubleshooting workflow for checking named listeners, firewall rules, named.conf configuration, DNS propagation issues, subdomain problems, resolv.conf errors, and common Apache/Nginx misconfigurations.

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Troubleshooting Dovecot in DirectAdmin – Fixing IMAP Errors, Authentication Issues, and SSL Certificate Checks

Dovecot is the IMAP/POP3 server used by DirectAdmin. Sometimes users encounter errors such as “Connection dropped by IMAP server” or “unknown user” during authentication. This guide explains how to fix corrupted Dovecot indexes, understand authentication logs, hide unnecessary warnings, and manually inspect SSL certificates on IMAP ports 143 and 993.

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Email Client Configuration & Dovecot Quota/Monitoring Guide for DirectAdmin Users

This guide explains how to configure popular email clients (iPhone Mail, Thunderbird, Gmail POP/SMTP), enable Dovecot LMTP quota warnings, and check the last login time for all email accounts on a DirectAdmin server. It includes step by step instructions, recommended IMAP/SMTP settings, and useful administrative scripts.

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