-
Recent Posts
- Thinking About Switching From WordPress? What Should You Consider Before You Move?
- The Airtable Acquisition Raises a Bigger Question: Do You Really Own the Software Your Business Runs On?
- How to Use Google Search Console’s New Generative AI Data to Improve Your SEO
- How to Update the Same Website Content on Multiple Pages at Once
- Discovered vs. Crawled Not Indexed in Google Search Console: What’s the Difference and How to Fix Each
- The Small Business Guide to Auditing Google Ads and Website Costs
- Do Professional Writers Still Need SEO in the Age of AI?
- Search Engine First vs. People First Content: Why Generic FAQ Dumps Harm Your SEO
- Looking for a Website Builder Without AI? Which One Should You Choose?
- Keyword Cannibalization: How to Find and Fix the Pages Stealing Your Own Google Traffic
- Why Great Content Gets Stuck on Page 8 (And How to Fix It)
- Why MySQL FULLTEXT Search Returns 0 Results (And How to Fix It)
- The Reality of Domain Speculation on New TLD Launches: Is It Still Worth It?
- The Hidden Domain Name Lock-In: Which Registrars Restrict Nameservers?
- Paying $10,000 a Month for SEO? Here’s How to Tell If You’re Getting Your Money’s Worth
- Introducing New WordPress Magazine Layouts in UltimateWB 9 (With Early Access)
- How to Fix the WordPress “Critical Error” on the Widgets Page After a PHP Upgrade
- The Hidden Risk of SaaS Website Builders: Lessons from the Recent Wix Outage
Categories
Tag Archives: server load spike
How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks
When a server load spikes to 30, 50, or 100+, most sysadmins panic and start haphazardly restarting services or blocking random IP addresses. However, modern attacks are rarely as simple as a single bad IP.
Today’s botnets use distributed Layer 7 (HTTP) floods, rotating through hundreds of unique IPs with only 1 connection each, exploiting web server application queues, fake WordPress scanners, background AJAX polling scripts, and WordPress admin-ajax.php endpoints that lock up MySQL.
This comprehensive guide covers how to diagnose,
... Continue reading
Posted in Coding, Server Admin & Security
Tagged .htaccess, 127.0.0.1, 403 Forbidden errors, 404 errors, ajax, ajax polling, ajax requests, apache, apache rate limiting, automated system tasks, bingbot, botnets, cache, caching, cpu, cpu load, cron jobs, csf, csf whitelist, CT_BLOCK_TIME, CT_LIMIT, CT_PORTS, database polling, database queue locks, ddos attacks, distributed attack, Googlebot, high server load, http, ip address, Jeypack, layer 7, linux, load averages, mibew messenger, mod_evasive, mysql, operator refresh time, php, processes, RAM, scrapers, script, server attack, server load, server load spike, subnet attack, sysadmin commands, whitelist, whm, xmlrpc.php
Leave a comment