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How to Whitelist Googlebot, Bingbot in CSF
One way to prevent server load spikes and maintain fast performance is to block problematic IP addresses and IP ranges. However, you have to make sure that legitimate crawlers, such as Googlebot and Bingbot, are not accidentally blocked from accessing your websites. Don't crash your SEO! We covered this important step in, “How to Stop High Server Load from Distributed Botnets, Scrapers, and Database Queue Locks”. If you don't know how to do this whitelisting, this tutorial is for
... Continue readingHow 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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