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.
Read more
Blog & Learn
Category Security
Practical articles on hosting, servers, security, SEO and online business — in plain, useful language.
Setting 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 moreWhat Is DNSSEC and Should We Enable It?
If your site goes down after enabling DNSSEC or resolvers stop responding, the problem is usually an expired signature. A practical guide to diagnosis and fixing.
Read moreEmail Deliverability Audit: Why Do Emails Go to Spam?
Are transactional emails going to spam? With an email deliverability audit, examine DNS records, domain warm-up, and reading the header of a rejected email step by step.
Read moreA Guide to Reading DMARC Reports and Detecting Sender Spoofing
How to read a raw DMARC report, separate authorized senders from spoofed ones, and figure out when you can enable the p=reject policy.
Read moreSite Hacked? Do These Things First
If your site is hacked, the first step is cutting off the attacker's access, not deleting files. This guide explains step by step the correct order of containment, preserving evidence, cleanup, and restoring the site.
Read moreFixing the Mixed Content Warning and Restoring the Green Padlock
The green padlock is gone and the console is full of Mixed Content errors? Here you'll learn how to pinpoint the exact resource and fix it in bulk.
Read moreSSL Error: A Guide to Quick Diagnosis and Fix
An SSL error has brought your site down, and you need to know which error you're seeing. This guide fixes incomplete chains, name mismatches, and silent expirations with real commands.
Read moreSecuring the WordPress REST API; Closing the Path to User Leaks
If your WordPress endpoint is leaking the user list or bots are hammering it with login attempts, this guide closes exactly the spots that are truly dangerous.
Read more