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Categories
Tag Archives: apache
How to Edit .htaccess on the Site Level or Add Rules Globally
In "How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks" we talked about how to fix your high server loads. That included adding rules to your site's .htaccess file, or updating the rules globally. If you don't know how to do that yet, this guide is for you.
Crucial First Step: Make a Backup
Before touching .htaccess, always make a copy. A single typo in this file will cause a "500 Internal Server Error" and take
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Posted in Coding, Server Admin & Security
Tagged .htaccess, 500 Internal Server Error, apache, apache configuration, cpanel, file manager, global apache configuration, global rules, include editor, nano text editor, post virtual host include, pre main include, pre virtualhost include, show hidden files, terminal, whm
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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,
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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
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