Engineering Blog
Thought leadership, tutorials, and industry insights on keeping the modern web fast and reliable.
Core Web Vitals: What Are LCP, CLS and INP and How to Improve Your Site's Score
Understand what LCP, CLS and INP measure, how to diagnose each metric and apply the right fixes to improve your PageSpeed score and climb Google rankings.
HTTP Security Headers: Your Site Is Failing Without You Knowing
Most websites score an F on security header audits — not because they were hacked, but because they never configured basic protections. Learn the 6 essential headers, how to set up HSTS, CSP, and X-Frame-Options, and use our checklist to reach an A+ grade.
Traceroute: How to Find Exactly Where Your Connection Is Slow
Learn how to use online traceroute to identify which hop on the route is causing latency. Practical guide to interpreting hops, timeouts, and abnormal latency spikes.
Open Ports on Your Server: How to Check and Close What Shouldn't Be Exposed
Every open port on your server is a potential entry point for attackers. Learn what TCP ports are, which ones are dangerous, how to scan with an online port scanner, and how to close what shouldn't be exposed.
Emails Landing in Spam? Your IP Might Be on a Blacklist
Learn what IP blacklists are, how to check if your address is blocked, and the step-by-step process to get delisted and restore your email deliverability.
SPF, DKIM, and DMARC: The Trio That Keeps Your Emails Out of Spam
Learn how to configure SPF, DKIM, and DMARC to protect your domain from spoofing, ensure your emails reach the inbox, and verify the health of your email DNS records.
WHOIS Lookup: How to Find Out Who Owns a Domain (and Not Lose Yours)
Learn what WHOIS lookup is, what information it reveals, and how to use it to verify site legitimacy, research competitors, and — most importantly — never lose your own domain.
DNS Propagation: Why Your Changes Take So Long and How to Check Them in Real Time
Understand why DNS propagation can take hours, how TTL and hierarchical resolver caching work, and how to check whether your changes have reached servers around the world.
DNS Lookup: How to Diagnose DNS Problems That Take Your Site Down
Changed hosting providers and your site disappeared? DNS problems are the #1 cause of silent downtime. Learn how to diagnose and fix them fast.
Top 5 Best Uptime Monitoring Tools in 2026
Choosing the right monitoring tool can be tough. We compare the top 5 tools based on speed, features, and price.
How to Create a Professional Status Page in 5 Minutes
Transparency is trust. Learn how to set up a hosted status page to communicate with your users during incidents.
How to Monitor Website Uptime Like a Pro
Discover the best practices for website monitoring, from choosing the right interval to setting up advanced alerts.
What is Downtime and Why is it Killing Your Business?
Downtime isn't just a technical glitch; it's a financial disaster. Learn about the real cost of outages and how to prevent them.
What is Uptime Monitoring? A Beginner's Guide
Learn what uptime monitoring is, why it's essential for your business, and how it keeps your website online.