Linux Server Hardening Checklist; In Order of Impact
Start server hardening where it actually prevents intrusion: SSH keys, firewall, updates, and a non-root user. The order of the work matters more than the number of tasks.
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Blog & Learn
Knowledge, tutorials & tech news
Practical articles on hosting, servers, security, SEO and online business — in plain, useful language.
EPP Code and Domain Transfer Lock: A Practical Guide
If your domain won't move, the problem is usually the EPP code or the transfer lock. Here you'll see the correct order of operations, the 60-day window, and real errors.
Read moreDomain Extension: .com or .ir? A Guide to Making the Right Choice
Choosing a domain extension isn't just a matter of taste; it affects user trust, local SEO, and the legal constraints of registration. Here, we make the decision simple.
Read moreSetting Up Fail2ban to Automatically Block Attackers
If your SSH or WordPress log is full of failed attempts, this guide walks you step by step through the default jail, writing a custom filter, and preventing yourself from getting blocked.
Read moreDNS Cache: Why Record Changes Don't Show Up and How to Flush It
You've changed the DNS record but the site still loads the old version? Get to know each DNS cache layer one by one and learn how to flush each one.
Read morePTR Record: Why Your Email Server Is Being Rejected
If your server's emails are going to spam or being rejected with a 550 error, the problem is likely a missing PTR record. Here you'll see who sets it and how.
Read moreSubdomains: Creation, SSL, and the Danger of Abandoned Ones
How to create a subdomain, why SSL and wildcard records go wrong here, and how an abandoned subdomain leads to compromise.
Read moreMy Domain Expired; Grace Period, Cost, and Recovery Path
An expired domain can be recovered within a few days without losing your site. This guide explains the grace periods, the real cost, and common mistakes in renewal.
Read moreNameservers: Choosing Between Host, Registrar, or Cloud
If your site stumbles on the registrar's nameservers, this guide shows the criteria for choosing between host, registrar, and cloud DNS — with numbers and commands.
Read morePractical guides for your website and server
Start with the guide that matches your task: configure a server, troubleshoot an error, or improve website performance. These reading paths complement the latest articles above.